{"id":24198,"date":"2021-12-17T17:11:56","date_gmt":"2021-12-17T10:11:56","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=24198"},"modified":"2021-12-17T17:11:57","modified_gmt":"2021-12-17T10:11:57","slug":"ti-le-the-tich-khoi-da-dien","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/ti-le-the-tich-khoi-da-dien\/","title":{"rendered":"T\u1ec8 L\u1ec6 TH\u1ec2 T\u00cdCH KH\u1ed0I \u0110A DI\u1ec6N"},"content":{"rendered":"\n<p><\/p>\n\n\n<h2><a id=\"post-24198-_Toc492701526\"><\/a><a id=\"post-24198-_Toc493273876\"><\/a><strong>A- L\u00dd THUY\u1ebeT CHUNG<\/strong><\/h2>\n<p><strong>1. <\/strong>Hai kh\u1ed1i ch\u00f3p <img decoding=\"async\" width=\"92\" height=\"30\" class=\"wp-image-24199\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_256-43.png\" alt=\"IMG_256\" \/> v\u00e0 <img decoding=\"async\" width=\"94\" height=\"30\" class=\"wp-image-24200\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_257-42.png\" alt=\"IMG_257\" \/> c\u00f3 chung \u0111\u1ec9nh <img decoding=\"async\" width=\"19\" height=\"24\" class=\"wp-image-24201\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_258-43.png\" alt=\"IMG_258\" \/> v\u00e0 hai m\u1eb7t \u0111\u00e1y c\u00f9ng n\u1eb1m tr\u00ean m\u1ed9t m\u1eb7t ph\u1eb3ng, ta c\u00f3: <img loading=\"lazy\" decoding=\"async\" width=\"161\" height=\"64\" class=\"wp-image-24202\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_259-40.png\" alt=\"IMG_259\" \/><\/p>\n<p><strong>2. <\/strong>Hai kh\u1ed1i ch\u00f3p tam gi\u00e1c <img loading=\"lazy\" decoding=\"async\" width=\"63\" height=\"24\" class=\"wp-image-24203\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_260-42.png\" alt=\"IMG_260\" \/> c\u00f3 <img loading=\"lazy\" decoding=\"async\" width=\"203\" height=\"27\" class=\"wp-image-24204\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_261-40.png\" alt=\"IMG_261\" \/> ta c\u00f3: <img loading=\"lazy\" decoding=\"async\" width=\"195\" height=\"57\" class=\"wp-image-24205\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_262-41.png\" alt=\"IMG_262\" \/><\/p>\n<p><strong>3. <\/strong>Ki\u1ebfn th\u1ee9c c\u1ea7n nh\u1edb \u0111\u1ed1i v\u1edbi kh\u1ed1i l\u0103ng tr\u1ee5 tam gi\u00e1c v\u00e0 kh\u1ed1i h\u1ed9p.<\/p>\n<p>\u00b7 <img loading=\"lazy\" decoding=\"async\" width=\"92\" height=\"52\" class=\"wp-image-24206\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_263-42.png\" alt=\"IMG_263\" \/><strong>, <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"116\" height=\"52\" class=\"wp-image-24207\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_264-41.png\" alt=\"IMG_264\" \/><strong>.<\/strong><\/p>\n<p>\u00b7 <img loading=\"lazy\" decoding=\"async\" width=\"92\" height=\"52\" class=\"wp-image-24208\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_265-41.png\" alt=\"IMG_265\" \/><strong>, <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"92\" height=\"52\" class=\"wp-image-24209\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_266-41.png\" alt=\"IMG_266\" \/><strong>.<\/strong><\/p>\n<p><strong>4. <\/strong>M\u1ed9t s\u1ed1 c\u00f4ng th\u1ee9c nhanh cho c\u00e1c tr\u01b0\u1eddng h\u1ee3p hay g\u1eb7p<\/p>\n<p>\u00b7 Tam gi\u00e1c <img loading=\"lazy\" decoding=\"async\" width=\"47\" height=\"24\" class=\"wp-image-24210\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_267-42.png\" alt=\"IMG_267\" \/> vu\u00f4ng t\u1ea1i <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"22\" class=\"wp-image-24211\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_268-42.png\" alt=\"IMG_268\" \/> c\u00f3 \u0111\u01b0\u1eddng cao <img loading=\"lazy\" decoding=\"async\" width=\"38\" height=\"22\" class=\"wp-image-24212\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_269-42.png\" alt=\"IMG_269\" \/> c\u00f3 <img loading=\"lazy\" decoding=\"async\" width=\"125\" height=\"63\" class=\"wp-image-24213\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_270-40.png\" alt=\"IMG_270\" \/> <img loading=\"lazy\" decoding=\"async\" width=\"125\" height=\"63\" class=\"wp-image-24214\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_271-42.png\" alt=\"IMG_271\" \/><\/p>\n<p>\u00b7 M\u1eb7t ph\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"35\" height=\"33\" class=\"wp-image-24215\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_272-42.png\" alt=\"IMG_272\" \/> song song v\u1edbi m\u1eb7t \u0111\u00e1y c\u1ee7a kh\u1ed1i ch\u00f3p <img loading=\"lazy\" decoding=\"async\" width=\"92\" height=\"30\" class=\"wp-image-24216\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_273-40.png\" alt=\"IMG_273\" \/> c\u1eaft <img loading=\"lazy\" decoding=\"async\" width=\"33\" height=\"30\" class=\"wp-image-24217\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_274-41.png\" alt=\"IMG_274\" \/> t\u1ea1i \u0111i\u1ec3m <img loading=\"lazy\" decoding=\"async\" width=\"32\" height=\"30\" class=\"wp-image-24218\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_275-40.png\" alt=\"IMG_275\" \/> th\u1ecfa m\u00e3n <img loading=\"lazy\" decoding=\"async\" width=\"86\" height=\"57\" class=\"wp-image-24219\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_276-41.png\" alt=\"IMG_276\" \/> ta c\u00f3 <img loading=\"lazy\" decoding=\"async\" width=\"131\" height=\"64\" class=\"wp-image-24220\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_277-41.png\" alt=\"IMG_277\" \/><\/p>\n<p>\u00b7 H\u00ecnh l\u0103ng tr\u1ee5 tam gi\u00e1c <img loading=\"lazy\" decoding=\"async\" width=\"103\" height=\"24\" class=\"wp-image-24221\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_278-42.png\" alt=\"IMG_278\" \/> c\u00f3 <img loading=\"lazy\" decoding=\"async\" width=\"217\" height=\"52\" class=\"wp-image-24222\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_279-40.png\" alt=\"IMG_279\" \/> c\u00f3 <img loading=\"lazy\" decoding=\"async\" width=\"178\" height=\"52\" class=\"wp-image-24223\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_280-42.png\" alt=\"IMG_280\" \/><\/p>\n<p>\u00b7 H\u00ecnh h\u1ed9p <img loading=\"lazy\" decoding=\"async\" width=\"138\" height=\"24\" class=\"wp-image-24224\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_281-41.png\" alt=\"IMG_281\" \/> c\u00f3 <img loading=\"lazy\" decoding=\"async\" width=\"217\" height=\"52\" class=\"wp-image-24225\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_282-42.png\" alt=\"IMG_282\" \/> . M\u1eb7t ph\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"66\" height=\"33\" class=\"wp-image-24226\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_283-41.png\" alt=\"IMG_283\" \/> c\u1eaft <img loading=\"lazy\" decoding=\"async\" width=\"43\" height=\"22\" class=\"wp-image-24227\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_284-41.png\" alt=\"IMG_284\" \/> t\u1ea1i <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"27\" class=\"wp-image-24228\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_285-42.png\" alt=\"IMG_285\" \/> th\u00ec ta c\u00f3 \u0111\u1eb3ng th\u1ee9c <img loading=\"lazy\" decoding=\"async\" width=\"100\" height=\"24\" class=\"wp-image-24229\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_286-41.png\" alt=\"IMG_286\" \/> v\u1edbi <img loading=\"lazy\" decoding=\"async\" width=\"71\" height=\"52\" class=\"wp-image-24230\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_287-42.png\" alt=\"IMG_287\" \/> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"220\" height=\"52\" class=\"wp-image-24231\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_288-42.png\" alt=\"IMG_288\" \/><\/p>\n<p>\u00b7 H\u00ecnh ch\u00f3p <img loading=\"lazy\" decoding=\"async\" width=\"77\" height=\"24\" class=\"wp-image-24232\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_289-43.png\" alt=\"IMG_289\" \/> c\u00f3 \u0111\u00e1y <img loading=\"lazy\" decoding=\"async\" width=\"61\" height=\"24\" class=\"wp-image-24233\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_290-42.png\" alt=\"IMG_290\" \/> l\u00e0 h\u00ecnh b\u00ecnh h\u00e0nh v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"203\" height=\"52\" class=\"wp-image-24234\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_291-41.png\" alt=\"IMG_291\" \/> . M\u1eb7t ph\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"66\" height=\"33\" class=\"wp-image-24235\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_292-42.png\" alt=\"IMG_292\" \/> c\u1eaft <img loading=\"lazy\" decoding=\"async\" width=\"32\" height=\"24\" class=\"wp-image-24236\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_293-42.png\" alt=\"IMG_293\" \/> t\u1ea1i <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"27\" class=\"wp-image-24237\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_294-41.png\" alt=\"IMG_294\" \/> th\u00ec ta c\u00f3 \u0111\u1eb3ng th\u1ee9c <img loading=\"lazy\" decoding=\"async\" width=\"113\" height=\"55\" class=\"wp-image-24238\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_295-40.png\" alt=\"IMG_295\" \/> v\u1edbi <img loading=\"lazy\" decoding=\"async\" width=\"63\" height=\"52\" class=\"wp-image-24239\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_296-40.png\" alt=\"IMG_296\" \/> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"272\" height=\"61\" class=\"wp-image-24240\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_297-40.png\" alt=\"IMG_297\" \/> .<\/p>\n<p>\u00b7 \u0110\u1ecbnh l\u00ed Meneleus cho 3 \u0111i\u1ec3m th\u1eb3ng h\u00e0ng <img loading=\"lazy\" decoding=\"async\" width=\"144\" height=\"52\" class=\"wp-image-24241\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_298-40.png\" alt=\"IMG_298\" \/> v\u1edbi <img loading=\"lazy\" decoding=\"async\" width=\"50\" height=\"24\" class=\"wp-image-24242\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_299-41.png\" alt=\"IMG_299\" \/> l\u00e0 m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng c\u1eaft ba \u0111\u01b0\u1eddng th\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"100\" height=\"27\" class=\"wp-image-24243\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_300-41.png\" alt=\"IMG_300\" \/> l\u1ea7n l\u01b0\u1ee3t t\u1ea1i <img loading=\"lazy\" decoding=\"async\" width=\"74\" height=\"27\" class=\"wp-image-24244\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_301-41.png\" alt=\"IMG_301\" \/><\/p>\n<h2><strong>B \u2013 B\u00c0I T\u1eacP TR\u1eaeC NGHI\u1ec6M<\/strong><\/h2>\n<p><strong>C\u00e2u 1: <\/strong>Cho h\u00ecnh ch\u00f3p <img loading=\"lazy\" decoding=\"async\" width=\"63\" height=\"24\" class=\"wp-image-24245\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_302-41.png\" alt=\"IMG_302\" \/> .Tr\u00ean c\u1ea1nh <img loading=\"lazy\" decoding=\"async\" width=\"29\" height=\"24\" class=\"wp-image-24246\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_303-41.png\" alt=\"IMG_303\" \/> l\u1ea5y c\u00e1c \u0111i\u1ec3m <img loading=\"lazy\" decoding=\"async\" width=\"50\" height=\"27\" class=\"wp-image-24247\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_304-41.png\" alt=\"IMG_304\" \/> sao cho <img loading=\"lazy\" decoding=\"async\" width=\"136\" height=\"24\" class=\"wp-image-24248\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_305-41.png\" alt=\"IMG_305\" \/> .G\u1ecdi <img loading=\"lazy\" decoding=\"async\" width=\"74\" height=\"33\" class=\"wp-image-24249\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_306-41.png\" alt=\"IMG_306\" \/> l\u00e0 c\u00e1c m\u1eb7t ph\u1eb3ng song song v\u1edbi m\u1eb7t ph\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"63\" height=\"33\" class=\"wp-image-24250\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_307-41.png\" alt=\"IMG_307\" \/> v\u00e0 l\u1ea7n l\u01b0\u1ee3t \u0111i qua <img loading=\"lazy\" decoding=\"async\" width=\"50\" height=\"27\" class=\"wp-image-24251\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_308-41.png\" alt=\"IMG_308\" \/> .Khi \u0111\u00f3 hai m\u1eb7t ph\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"74\" height=\"33\" class=\"wp-image-24252\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_309-40.png\" alt=\"IMG_309\" \/> chia kh\u1ed1i ch\u00f3p \u0111\u00e3 cho th\u00e0nh 3 ph\u1ea7n.N\u1ebfu ph\u1ea7n tr\u00ean c\u00f9ng c\u00f3 th\u1ec3 t\u00edch l\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"57\" height=\"30\" class=\"wp-image-24253\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_310-41.png\" alt=\"IMG_310\" \/> t\u00edch hai ph\u1ea7n c\u00f2n l\u1ea1i l\u1ea7n l\u01b0\u1ee3t l\u00e0?<\/p>\n<p><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"58\" height=\"30\" class=\"wp-image-24254\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_311-40.png\" alt=\"IMG_311\" \/> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"67\" height=\"30\" class=\"wp-image-24255\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_312-40.png\" alt=\"IMG_312\" \/> . <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"58\" height=\"30\" class=\"wp-image-24256\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_313-39.png\" alt=\"IMG_313\" \/> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"67\" height=\"30\" class=\"wp-image-24257\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_314-39.png\" alt=\"IMG_314\" \/> .<\/p>\n<p><strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"58\" height=\"30\" class=\"wp-image-24258\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_315-39.png\" alt=\"IMG_315\" \/> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"71\" height=\"30\" class=\"wp-image-24259\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_316-39.png\" alt=\"IMG_316\" \/> . <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"58\" height=\"30\" class=\"wp-image-24260\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_317-39.png\" alt=\"IMG_317\" \/> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"67\" height=\"30\" class=\"wp-image-24261\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_318-39.png\" alt=\"IMG_318\" \/> .<\/p>\n<p><strong>C\u00e2u 2: <\/strong>Cho h\u00ecnh ch\u00f3p <img loading=\"lazy\" decoding=\"async\" width=\"77\" height=\"24\" class=\"wp-image-24262\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_319-39.png\" alt=\"IMG_319\" \/> c\u00f3 \u0111\u00e1y <img loading=\"lazy\" decoding=\"async\" width=\"61\" height=\"24\" class=\"wp-image-24263\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_320-39.png\" alt=\"IMG_320\" \/> l\u00e0 h\u00ecnh b\u00ecnh h\u00e0nh v\u00e0 c\u00f3 th\u1ec3 t\u00edch b\u1eb1ng <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"24\" class=\"wp-image-24264\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_321-38.png\" alt=\"IMG_321\" \/> . G\u1ecdi <img loading=\"lazy\" decoding=\"async\" width=\"72\" height=\"27\" class=\"wp-image-24265\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_322-38.png\" alt=\"IMG_322\" \/> l\u1ea7n l\u01b0\u1ee3t l\u00e0 c\u00e1c \u0111i\u1ec3m tr\u00ean c\u00e1c c\u1ea1nh <img loading=\"lazy\" decoding=\"async\" width=\"92\" height=\"27\" class=\"wp-image-24266\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_323-36.png\" alt=\"IMG_323\" \/> sao cho <img loading=\"lazy\" decoding=\"async\" width=\"214\" height=\"52\" class=\"wp-image-24267\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_324-36.png\" alt=\"IMG_324\" \/> . M\u1eb7t ph\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"66\" height=\"33\" class=\"wp-image-24268\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_325-36.png\" alt=\"IMG_325\" \/> c\u1eaft c\u1ea1nh <img loading=\"lazy\" decoding=\"async\" width=\"32\" height=\"24\" class=\"wp-image-24269\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_326-36.png\" alt=\"IMG_326\" \/> t\u1ea1i \u0111i\u1ec3m <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"27\" class=\"wp-image-24270\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_327-36.png\" alt=\"IMG_327\" \/> . T\u00ednh th\u1ec3 t\u00edch kh\u1ed1i \u0111a di\u1ec7n <img loading=\"lazy\" decoding=\"async\" width=\"122\" height=\"27\" class=\"wp-image-24271\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_328-35.png\" alt=\"IMG_328\" \/> .<\/p>\n<p><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"46\" height=\"52\" class=\"wp-image-24272\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_329-35.png\" alt=\"IMG_329\" \/> . <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"46\" height=\"52\" class=\"wp-image-24273\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_330-35.png\" alt=\"IMG_330\" \/> . <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"46\" height=\"52\" class=\"wp-image-24274\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_331-35.png\" alt=\"IMG_331\" \/> . <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"46\" height=\"52\" class=\"wp-image-24275\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_332-35.png\" alt=\"IMG_332\" \/> .<\/p>\n<p><strong>C\u00e2u 3: <\/strong>Cho kh\u1ed1i ch\u00f3p <img loading=\"lazy\" decoding=\"async\" width=\"77\" height=\"24\" class=\"wp-image-24276\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_333-35.png\" alt=\"IMG_333\" \/> c\u00f3 \u0111\u00e1y l\u00e0 h\u00ecnh ch\u1eef nh\u1eadt, <img loading=\"lazy\" decoding=\"async\" width=\"88\" height=\"30\" class=\"wp-image-24277\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_334-34.png\" alt=\"IMG_334\" \/> , <img loading=\"lazy\" decoding=\"async\" width=\"66\" height=\"24\" class=\"wp-image-24278\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_335-34.png\" alt=\"IMG_335\" \/> , <img loading=\"lazy\" decoding=\"async\" width=\"29\" height=\"24\" class=\"wp-image-24279\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_336-34.png\" alt=\"IMG_336\" \/> vu\u00f4ng g\u00f3c v\u1edbi \u0111\u00e1y v\u00e0<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"58\" height=\"24\" class=\"wp-image-24280\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_337-34.png\" alt=\"IMG_337\" \/> . M\u1eb7t ph\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"35\" height=\"33\" class=\"wp-image-24281\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_338-34.png\" alt=\"IMG_338\" \/> qua <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"22\" class=\"wp-image-24282\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_339-33.png\" alt=\"IMG_339\" \/> vu\u00f4ng g\u00f3c v\u1edbi <img loading=\"lazy\" decoding=\"async\" width=\"32\" height=\"24\" class=\"wp-image-24283\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_340-33.png\" alt=\"IMG_340\" \/> c\u1eaft <img loading=\"lazy\" decoding=\"async\" width=\"30\" height=\"24\" class=\"wp-image-24284\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_341-33.png\" alt=\"IMG_341\" \/> , <img loading=\"lazy\" decoding=\"async\" width=\"32\" height=\"24\" class=\"wp-image-24285\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_342-33.png\" alt=\"IMG_342\" \/> , <img loading=\"lazy\" decoding=\"async\" width=\"32\" height=\"24\" class=\"wp-image-24286\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_343-32.png\" alt=\"IMG_343\" \/> l\u1ea7n l\u01b0\u1ee3t t\u1ea1i <img loading=\"lazy\" decoding=\"async\" width=\"27\" height=\"22\" class=\"wp-image-24287\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_344-32.png\" alt=\"IMG_344\" \/> , <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"24\" class=\"wp-image-24288\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_345-32.png\" alt=\"IMG_345\" \/> , <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"22\" class=\"wp-image-24289\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_346-31.png\" alt=\"IMG_346\" \/> . T\u00ednh th\u1ec3 t\u00edch kh\u1ed1i ch\u00f3p <img loading=\"lazy\" decoding=\"async\" width=\"78\" height=\"24\" class=\"wp-image-24290\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_347-30.png\" alt=\"IMG_347\" \/> .<\/p>\n<p><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"61\" height=\"57\" class=\"wp-image-24291\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_348-29.png\" alt=\"IMG_348\" \/> . <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"50\" height=\"57\" class=\"wp-image-24292\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_349-29.png\" alt=\"IMG_349\" \/> . <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"50\" height=\"57\" class=\"wp-image-24293\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_350-29.png\" alt=\"IMG_350\" \/> . <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"50\" height=\"57\" class=\"wp-image-24294\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_351-29.png\" alt=\"IMG_351\" \/> .<\/p>\n<p><strong>C\u00e2u 4: <\/strong>Cho kh\u1ed1i ch\u00f3p <img loading=\"lazy\" decoding=\"async\" width=\"77\" height=\"24\" class=\"wp-image-24295\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_352-29.png\" alt=\"IMG_352\" \/> c\u00f3 th\u1ec3 t\u00edch <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"24\" class=\"wp-image-24296\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_353-29.png\" alt=\"IMG_353\" \/> v\u00e0 \u0111\u00e1y l\u00e0 h\u00ecnh b\u00ecnh h\u00e0nh. \u0110i\u1ec3m <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"24\" class=\"wp-image-24297\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_354-29.png\" alt=\"IMG_354\" \/> th\u1ecfa m\u00e3n <img loading=\"lazy\" decoding=\"async\" width=\"152\" height=\"35\" class=\"wp-image-24298\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_355-29.png\" alt=\"IMG_355\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_355-29.png 152w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_355-29-150x35.png 150w\" sizes=\"(max-width: 152px) 100vw, 152px\" \/> . Bi\u1ebft th\u1ec3 t\u00edch ph\u1ea7n chung c\u1ee7a hai kh\u1ed1i ch\u00f3p <img loading=\"lazy\" decoding=\"async\" width=\"77\" height=\"24\" class=\"wp-image-24299\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_356-29.png\" alt=\"IMG_356\" \/> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"80\" height=\"24\" class=\"wp-image-24300\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_357-29.png\" alt=\"IMG_357\" \/> l\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"46\" height=\"52\" class=\"wp-image-24301\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_358-29.png\" alt=\"IMG_358\" \/> . T\u00ecm <img loading=\"lazy\" decoding=\"async\" width=\"18\" height=\"24\" class=\"wp-image-24302\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_359-28.png\" alt=\"IMG_359\" \/> .<\/p>\n<p><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"47\" height=\"24\" class=\"wp-image-24303\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_360-27.png\" alt=\"IMG_360\" \/> . <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"47\" height=\"24\" class=\"wp-image-24304\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_361-26.png\" alt=\"IMG_361\" \/> . <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"53\" height=\"24\" class=\"wp-image-24305\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_362-26.png\" alt=\"IMG_362\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_362-26.png 53w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_362-26-50x24.png 50w\" sizes=\"(max-width: 53px) 100vw, 53px\" \/> . <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"47\" height=\"24\" class=\"wp-image-24306\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_363-23.png\" alt=\"IMG_363\" \/> .<\/p>\n<p><strong>C\u00e2u 5: <\/strong>Cho h\u00ecnh ch\u00f3p <img loading=\"lazy\" decoding=\"async\" width=\"63\" height=\"24\" class=\"wp-image-24307\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_364-25.png\" alt=\"IMG_364\" \/> c\u00f3 t\u1ea5t c\u1ea3 c\u00e1c c\u1ea1nh \u0111\u1ec1u b\u1eb1ng <img loading=\"lazy\" decoding=\"async\" width=\"18\" height=\"19\" class=\"wp-image-24308\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_365-25.png\" alt=\"IMG_365\" \/> . M\u1ed9t m\u1eb7t ph\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"35\" height=\"33\" class=\"wp-image-24309\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_366-25.png\" alt=\"IMG_366\" \/> song song v\u1edbi m\u1eb7t \u0111\u00e1y <img loading=\"lazy\" decoding=\"async\" width=\"63\" height=\"33\" class=\"wp-image-24310\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_367-25.png\" alt=\"IMG_367\" \/> c\u1eaft c\u00e1c c\u1ea1nh <img loading=\"lazy\" decoding=\"async\" width=\"29\" height=\"24\" class=\"wp-image-24311\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_368-24.png\" alt=\"IMG_368\" \/> , <img loading=\"lazy\" decoding=\"async\" width=\"30\" height=\"24\" class=\"wp-image-24312\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_369-24.png\" alt=\"IMG_369\" \/> , <img loading=\"lazy\" decoding=\"async\" width=\"32\" height=\"24\" class=\"wp-image-24313\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_370-24.png\" alt=\"IMG_370\" \/> l\u1ea7n l\u01b0\u1ee3t t\u1ea1i <img loading=\"lazy\" decoding=\"async\" width=\"27\" height=\"22\" class=\"wp-image-24314\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_371-24.png\" alt=\"IMG_371\" \/> , <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"24\" class=\"wp-image-24315\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_372-24.png\" alt=\"IMG_372\" \/> , <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"22\" class=\"wp-image-24316\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_373-23.png\" alt=\"IMG_373\" \/> . T\u00ednh di\u1ec7n t\u00edch tam gi\u00e1c <img loading=\"lazy\" decoding=\"async\" width=\"50\" height=\"24\" class=\"wp-image-24317\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_374-22.png\" alt=\"IMG_374\" \/> bi\u1ebft <img loading=\"lazy\" decoding=\"async\" width=\"35\" height=\"33\" class=\"wp-image-24318\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_375-22.png\" alt=\"IMG_375\" \/> chia kh\u1ed1i ch\u00f3p \u0111\u00e3 cho th\u00e0nh hai kh\u1ed1i \u0111a di\u1ec7n c\u00f3 th\u1ec3 t\u00edch b\u1eb1ng nhau.<\/p>\n<p><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"120\" height=\"57\" class=\"wp-image-24319\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_376-21.png\" alt=\"IMG_376\" \/> . <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"120\" height=\"57\" class=\"wp-image-24320\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_377-20.png\" alt=\"IMG_377\" \/> . <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"120\" height=\"61\" class=\"wp-image-24321\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_378-19.png\" alt=\"IMG_378\" \/><strong> D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"120\" height=\"61\" class=\"wp-image-24322\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_379-19.png\" alt=\"IMG_379\" \/> .<\/p>\n<p><strong>C\u00e2u 6: <\/strong>Cho h\u00ecnh ch\u00f3p <img loading=\"lazy\" decoding=\"async\" width=\"77\" height=\"24\" class=\"wp-image-24323\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_380-19.png\" alt=\"IMG_380\" \/> c\u00f3 \u0111\u00e1y <img loading=\"lazy\" decoding=\"async\" width=\"61\" height=\"24\" class=\"wp-image-24324\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_381-19.png\" alt=\"IMG_381\" \/> l\u00e0 h\u00ecnh ch\u1eef nh\u1eadt v\u1edbi <img loading=\"lazy\" decoding=\"async\" width=\"128\" height=\"27\" class=\"wp-image-24325\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_382-19.png\" alt=\"IMG_382\" \/> v\u00e0 c\u1ea1nh b\u00ean <img loading=\"lazy\" decoding=\"async\" width=\"57\" height=\"24\" class=\"wp-image-24326\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_383-19.png\" alt=\"IMG_383\" \/> vu\u00f4ng g\u00f3c v\u1edbi m\u1eb7t ph\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"77\" height=\"33\" class=\"wp-image-24327\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_384-19.png\" alt=\"IMG_384\" \/> . G\u1ecdi <img loading=\"lazy\" decoding=\"async\" width=\"27\" height=\"22\" class=\"wp-image-24328\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_385-18.png\" alt=\"IMG_385\" \/> l\u00e0 m\u1ed9t \u0111i\u1ec3m tr\u00ean c\u1ea1nh <img loading=\"lazy\" decoding=\"async\" width=\"29\" height=\"24\" class=\"wp-image-24329\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_386-18.png\" alt=\"IMG_386\" \/> sao cho <img loading=\"lazy\" decoding=\"async\" width=\"158\" height=\"33\" class=\"wp-image-24330\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_387-16.png\" alt=\"IMG_387\" \/> . T\u00ecm <img loading=\"lazy\" decoding=\"async\" width=\"18\" height=\"19\" class=\"wp-image-24331\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_388-14.png\" alt=\"IMG_388\" \/> \u0111\u1ec3 m\u1eb7t ph\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"66\" height=\"33\" class=\"wp-image-24332\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_389-12.png\" alt=\"IMG_389\" \/> chia kh\u1ed1i ch\u00f3p th\u00e0nh hai kh\u1ed1i \u0111a di\u1ec7n c\u00f3 th\u1ec3 t\u00edch b\u1eb1ng nhau.<\/p>\n<p><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"119\" height=\"66\" class=\"wp-image-24333\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_390-13.png\" alt=\"IMG_390\" \/> . <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"128\" height=\"66\" class=\"wp-image-24334\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_391-12.png\" alt=\"IMG_391\" \/> . <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"117\" height=\"66\" class=\"wp-image-24335\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_392-13.png\" alt=\"IMG_392\" \/> . <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"125\" height=\"66\" class=\"wp-image-24336\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_393-13.png\" alt=\"IMG_393\" \/> .<\/p>\n<p><strong>C\u00e2u 7: <\/strong>Cho h\u00ecnh ch\u00f3p <img loading=\"lazy\" decoding=\"async\" width=\"71\" height=\"24\" class=\"wp-image-24337\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_394-13.png\" alt=\"IMG_394\" \/> c\u00f3 \u0111\u00e1y <img loading=\"lazy\" decoding=\"async\" width=\"61\" height=\"24\" class=\"wp-image-24338\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_395-12.png\" alt=\"IMG_395\" \/> l\u00e0 h\u00ecnh thang v\u1edbi <img loading=\"lazy\" decoding=\"async\" width=\"81\" height=\"24\" class=\"wp-image-24339\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_396-12.png\" alt=\"IMG_396\" \/> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"92\" height=\"24\" class=\"wp-image-24340\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_397-12.png\" alt=\"IMG_397\" \/> .G\u1ecdi <img loading=\"lazy\" decoding=\"async\" width=\"27\" height=\"22\" class=\"wp-image-24341\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_398-13.png\" alt=\"IMG_398\" \/> l\u00e0 1 \u0111i\u1ec3m tr\u00ean c\u1ea1nh <img loading=\"lazy\" decoding=\"async\" width=\"29\" height=\"24\" class=\"wp-image-24342\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_399-13.png\" alt=\"IMG_399\" \/> sao cho <img loading=\"lazy\" decoding=\"async\" width=\"113\" height=\"24\" class=\"wp-image-24343\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_400-13.png\" alt=\"IMG_400\" \/> . T\u00ecm t\u1ec9 s\u1ed1 <img loading=\"lazy\" decoding=\"async\" width=\"41\" height=\"52\" class=\"wp-image-24344\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_401-13.png\" alt=\"IMG_401\" \/> sao cho m\u1eb7t ph\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"69\" height=\"33\" class=\"wp-image-24345\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_402-13.png\" alt=\"IMG_402\" \/> chia kh\u1ed1i ch\u00f3p \u0111\u00e3 cho th\u00e0nh hai kh\u1ed1i \u0111a di\u1ec7n c\u00f3 th\u1ec3 t\u00edch b\u1eb1ng nhau:<\/p>\n<p><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"134\" height=\"57\" class=\"wp-image-24346\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_403-13.png\" alt=\"IMG_403\" \/> . <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"138\" height=\"57\" class=\"wp-image-24347\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_404-13.png\" alt=\"IMG_404\" \/> . <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"134\" height=\"57\" class=\"wp-image-24348\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_405-13.png\" alt=\"IMG_405\" \/> . <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"136\" height=\"57\" class=\"wp-image-24349\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_406-13.png\" alt=\"IMG_406\" \/> .<\/p>\n<p><strong>C\u00e2u 8: <\/strong>Cho \u0111i\u1ec3m <img loading=\"lazy\" decoding=\"async\" width=\"27\" height=\"22\" class=\"wp-image-24350\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_407-13.png\" alt=\"IMG_407\" \/> tr\u00ean c\u1ea1nh <img loading=\"lazy\" decoding=\"async\" width=\"29\" height=\"24\" class=\"wp-image-24351\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_408-13.png\" alt=\"IMG_408\" \/> , \u0111i\u1ec3m N tr\u00ean c\u1ea1nh <img loading=\"lazy\" decoding=\"async\" width=\"30\" height=\"24\" class=\"wp-image-24352\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_409-13.png\" alt=\"IMG_409\" \/> c\u1ee7a h\u00ecnh ch\u00f3p tam gi\u00e1c <img loading=\"lazy\" decoding=\"async\" width=\"63\" height=\"24\" class=\"wp-image-24353\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_410-13.png\" alt=\"IMG_410\" \/> c\u00f3 th\u1ec3 t\u00edch b\u1eb1ng <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"24\" class=\"wp-image-24354\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_411-13.png\" alt=\"IMG_411\" \/> sao cho <img loading=\"lazy\" decoding=\"async\" width=\"141\" height=\"52\" class=\"wp-image-24355\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_412-13.png\" alt=\"IMG_412\" \/> . M\u1eb7t ph\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"35\" height=\"33\" class=\"wp-image-24356\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_413-13.png\" alt=\"IMG_413\" \/> qua <img loading=\"lazy\" decoding=\"async\" width=\"39\" height=\"24\" class=\"wp-image-24357\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_414-13.png\" alt=\"IMG_414\" \/> v\u00e0 song song v\u1edbi <img loading=\"lazy\" decoding=\"async\" width=\"32\" height=\"24\" class=\"wp-image-24358\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_415-13.png\" alt=\"IMG_415\" \/> chia kh\u1ed1i ch\u00f3p <img loading=\"lazy\" decoding=\"async\" width=\"63\" height=\"24\" class=\"wp-image-24359\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_416-13.png\" alt=\"IMG_416\" \/> th\u00e0nh hai kh\u1ed1i \u0111a di\u1ec7n c\u00f3 th\u1ec3 t\u00edch b\u1eb1ng nhau. T\u00ednh <img loading=\"lazy\" decoding=\"async\" width=\"18\" height=\"19\" class=\"wp-image-24360\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_417-13.png\" alt=\"IMG_417\" \/> .<\/p>\n<p><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"92\" height=\"57\" class=\"wp-image-24361\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_418-13.png\" alt=\"IMG_418\" \/> <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"99\" height=\"57\" class=\"wp-image-24362\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_419-12.png\" alt=\"IMG_419\" \/> <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"92\" height=\"57\" class=\"wp-image-24363\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_420-12.png\" alt=\"IMG_420\" \/> <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"99\" height=\"57\" class=\"wp-image-24364\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_421-12.png\" alt=\"IMG_421\" \/><\/p>\n<p><strong>C\u00e2u 9: <\/strong>Cho kh\u1ed1i t\u1ee9 di\u1ec7n \u0111\u1ec1u <img loading=\"lazy\" decoding=\"async\" width=\"61\" height=\"24\" class=\"wp-image-24365\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_422-12.png\" alt=\"IMG_422\" \/> c\u1ea1nh b\u1eb1ng <img loading=\"lazy\" decoding=\"async\" width=\"18\" height=\"19\" class=\"wp-image-24366\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_423-12.png\" alt=\"IMG_423\" \/> , G\u1ecdi <img loading=\"lazy\" decoding=\"async\" width=\"27\" height=\"22\" class=\"wp-image-24367\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_424-12.png\" alt=\"IMG_424\" \/> , <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"24\" class=\"wp-image-24368\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_425-12.png\" alt=\"IMG_425\" \/> l\u00e0 trung \u0111i\u1ec3m c\u00e1c c\u1ea1nh <img loading=\"lazy\" decoding=\"async\" width=\"33\" height=\"22\" class=\"wp-image-24369\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_426-12.png\" alt=\"IMG_426\" \/> , <img loading=\"lazy\" decoding=\"async\" width=\"33\" height=\"24\" class=\"wp-image-24370\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_427-12.png\" alt=\"IMG_427\" \/> sv\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"22\" class=\"wp-image-24371\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_428-12.png\" alt=\"IMG_428\" \/> l\u00e0 \u0111i\u1ec3m thu\u1ed9c tia \u0111\u1ed1i <img loading=\"lazy\" decoding=\"async\" width=\"33\" height=\"22\" class=\"wp-image-24372\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_429-12.png\" alt=\"IMG_429\" \/> sao cho <img loading=\"lazy\" decoding=\"async\" width=\"69\" height=\"52\" class=\"wp-image-24373\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_430-11.png\" alt=\"IMG_430\" \/> . T\u00ecm <img loading=\"lazy\" decoding=\"async\" width=\"18\" height=\"24\" class=\"wp-image-24374\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_431-10.png\" alt=\"IMG_431\" \/> \u0111\u1ec3 m\u1eb7t ph\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"66\" height=\"33\" class=\"wp-image-24375\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_432-10.png\" alt=\"IMG_432\" \/> chia kh\u1ed1i t\u1ee9 di\u1ec7n th\u00e0nh hai kh\u1ed1i \u0111a di\u1ec7n, trong \u0111\u00f3 kh\u1ed1i \u0111a di\u1ec7n ch\u1ee9a \u0111\u1ec9nh <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"22\" class=\"wp-image-24376\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_433-10.png\" alt=\"IMG_433\" \/> c\u00f3 th\u1ec3 t\u00edch l\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"69\" height=\"57\" class=\"wp-image-24377\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_434-10.png\" alt=\"IMG_434\" \/> .<\/p>\n<p><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"50\" height=\"52\" class=\"wp-image-24378\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_435-10.png\" alt=\"IMG_435\" \/> . <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"47\" height=\"24\" class=\"wp-image-24379\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_436-10.png\" alt=\"IMG_436\" \/> . <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"47\" height=\"24\" class=\"wp-image-24380\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_437-11.png\" alt=\"IMG_437\" \/> . <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"49\" height=\"24\" class=\"wp-image-24381\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_438-11.png\" alt=\"IMG_438\" \/> .<\/p>\n<p><strong>C\u00e2u 10: <\/strong>Cho kh\u1ed1i t\u1ee9 di\u1ec7n \u0111\u1ec1u <img loading=\"lazy\" decoding=\"async\" width=\"61\" height=\"24\" class=\"wp-image-24382\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_439-11.png\" alt=\"IMG_439\" \/> c\u1ea1nh b\u1eb1ng <img loading=\"lazy\" decoding=\"async\" width=\"44\" height=\"24\" class=\"wp-image-24383\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_440-11.png\" alt=\"IMG_440\" \/> G\u1ecdi <img loading=\"lazy\" decoding=\"async\" width=\"72\" height=\"27\" class=\"wp-image-24384\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_441-11.png\" alt=\"IMG_441\" \/> l\u1ea7n l\u01b0\u1ee3t l\u00e0 tr\u1ecdng t\u00e2m c\u1ee7a ba tam gi\u00e1c <img loading=\"lazy\" decoding=\"async\" width=\"147\" height=\"27\" class=\"wp-image-24385\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_442-11.png\" alt=\"IMG_442\" \/> T\u00ednh th\u1ec3 t\u00edch <img loading=\"lazy\" decoding=\"async\" width=\"21\" height=\"24\" class=\"wp-image-24386\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_443-9.png\" alt=\"IMG_443\" \/> c\u1ee7a kh\u1ed1i ch\u00f3p <img loading=\"lazy\" decoding=\"async\" width=\"67\" height=\"24\" class=\"wp-image-24387\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_444-9.png\" alt=\"IMG_444\" \/><\/p>\n<p><strong>A. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"102\" height=\"57\" class=\"wp-image-24388\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_445-9.png\" alt=\"IMG_445\" \/> . <strong>B. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"111\" height=\"57\" class=\"wp-image-24389\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_446-8.png\" alt=\"IMG_446\" \/> . <strong>C. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"111\" height=\"57\" class=\"wp-image-24390\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_447-8.png\" alt=\"IMG_447\" \/> . <strong>D. <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"102\" height=\"57\" class=\"wp-image-24391\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_448-8.png\" alt=\"IMG_448\" \/> .<\/p>","protected":false},"excerpt":{"rendered":"<p>A- L\u00dd THUY\u1ebeT CHUNG 1. Hai kh\u1ed1i ch\u00f3p v\u00e0 c\u00f3 chung \u0111\u1ec9nh v\u00e0 hai m\u1eb7t \u0111\u00e1y c\u00f9ng n\u1eb1m tr\u00ean m\u1ed9t m\u1eb7t ph\u1eb3ng, ta c\u00f3: 2. Hai kh\u1ed1i ch\u00f3p tam gi\u00e1c c\u00f3 ta c\u00f3: 3. Ki\u1ebfn th\u1ee9c c\u1ea7n nh\u1edb \u0111\u1ed1i v\u1edbi kh\u1ed1i l\u0103ng tr\u1ee5 tam gi\u00e1c v\u00e0 kh\u1ed1i h\u1ed9p. \u00b7 , . \u00b7 , . 4. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[43],"tags":[],"class_list":["post-24198","post","type-post","status-publish","format-standard","hentry","category-toan-lop-12"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/24198","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=24198"}],"version-history":[{"count":1,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/24198\/revisions"}],"predecessor-version":[{"id":24392,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/24198\/revisions\/24392"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=24198"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=24198"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=24198"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}