{"id":2627,"date":"2021-10-14T21:14:10","date_gmt":"2021-10-14T14:14:10","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=2627"},"modified":"2021-10-14T22:11:12","modified_gmt":"2021-10-14T15:11:12","slug":"kien-thuc-ve-doa%cc%a3n-tha%cc%89ng-do-do%cc%a3-dai-doa%cc%a3n-tha%cc%89ng-toan-7","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/kien-thuc-ve-doa%cc%a3n-tha%cc%89ng-do-do%cc%a3-dai-doa%cc%a3n-tha%cc%89ng-toan-7\/","title":{"rendered":"Ki\u00ea\u0301n th\u01b0\u0301c v\u00ea\u0300 \u0111oa\u0323n th\u0103\u0309ng &amp; \u0111o \u0111\u00f4\u0323 da\u0300i \u0111oa\u0323n th\u0103\u0309ng \u2013 To\u00e1n 7"},"content":{"rendered":"\n<p>Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn<\/p>\n\n\n\n<p>\u01a0\u0309 ba\u0300i tr\u01b0\u01a1\u0301c, chu\u0301ng ta \u0111a\u0303 cu\u0300ng ti\u0300m hi\u00ea\u0309u ca\u0301c ki\u00ea\u0301n th\u01b0\u0301c v\u00ea\u0300 tia. Ba\u0300i vi\u00ea\u0301t na\u0300y chu\u0301ng ta se\u0303 ti\u00ea\u0301p tu\u0323c ti\u0300m hi\u00ea\u0309u v\u00ea\u0300 ki\u00ea\u0301n th\u01b0\u0301c v\u00ea\u0300 \u0111oa\u0323n th\u0103\u0309ng l\u01a1\u0301p 6 va\u0300 ca\u0301ch \u0111o \u0111\u00f4\u0323 da\u0300i. \u0110oa\u0323n th\u0103\u0309ng va\u0300 \u0111o \u0111\u00f4\u0323 da\u0300i \u0111oa\u0323n th\u0103\u0309ng la\u0300 m\u00f4\u0323t trong nh\u01b0\u0303ng kha\u0301i ni\u00ea\u0323m, ki\u00ea\u0301n th\u01b0\u0301c c\u0103n ba\u0309n cu\u0309a ph\u00e2\u0300n hi\u0300nh ho\u0323c trong m\u00f4n Toa\u0301n. Vi\u0300 v\u00e2\u0323y, ca\u0301c ba\u0323n ho\u0323c sinh c\u00e2\u0300n hi\u00ea\u0309u ro\u0303 ba\u0309n ch\u00e2\u0301t cu\u0309a kha\u0301i nhi\u00ea\u0323m c\u0103n ba\u0309n na\u0300y. \u0110\u00ea\u0309 kh\u00f4ng bi\u0323 nh\u00e2\u0300m l\u00e2\u0303n kha\u0301i ni\u00ea\u0323m, ha\u0303y cu\u0300ng Vietlearn kha\u0301m pha\u0301 kha\u0301i ni\u00ea\u0323m \u0111oa\u0323n th\u0103\u0309ng l\u01a1\u0301p 6 ngay sau \u0111\u00e2y:<\/p>\n\n\n\n<p>Kha\u0301i ni\u00ea\u0323m<\/p>\n\n\n\n<p>Kha\u0301i ni\u00ea\u0323m \u0111oa\u0323n th\u0103\u0309ng<\/p>\n\n\n\n<p>Nhi\u0300n va\u0300o hi\u0300nh ve\u0303, ta th\u00e2\u0301y:<\/p>\n\n\n\n<p>Bu\u0301t chi\u0300 \u0111ang va\u0323ch theo ca\u0323nh th\u01b0\u01a1\u0301c t\u01b0\u0300 \u0111i\u00ea\u0309m A \u0111\u00ea\u0301n \u0111i\u00ea\u0309m B. \u0110oa\u0323n \u0111\u01b0\u01a1\u0323c bu\u0301t chi\u0300 n\u00f4\u0301i \u0111\u01b0\u01a1\u0323c go\u0323i la\u0300 \u0111oa\u0323n th\u0103\u0309ng. \u01a0\u0309 hi\u0300nh ve\u0303 la\u0300 \u0111oa\u0323n th\u0103\u0309ng AB.<\/p>\n\n\n\n<p>C la\u0300 \u0111\u00e2\u0300u bu\u0301t chi\u0300 co\u0301 th\u00ea\u0309 tru\u0300ng v\u01a1\u0301i A, B ho\u0103\u0323c \u01a1\u0309 b\u00e2\u0301t c\u01b0\u0301 \u0111\u00e2u gi\u01b0\u0303a A va\u0300 B tr\u00ean \u0111oa\u0323n th\u0103\u0309ng AB.<\/p>\n\n\n\n<p>A va\u0300 B la\u0300 hai h\u00e2\u0300u mu\u0301t ho\u0103\u0323c 2 \u0111\u00e2\u0300u \u0111oa\u0323n th\u0103\u0309ng.<\/p>\n\n\n\n<p>Ta co\u0301 th\u00ea\u0309 go\u0323i la\u0300 \u0111oa\u0323n th\u0103\u0309ng AB ho\u0103\u0323c BA.<\/p>\n\n\n\n<p>Vi\u0323 tri\u0301 \u0111oa\u0323n th\u0103\u0309ng<\/p>\n\n\n\n<p>\u0110oa\u0323n th\u0103\u0309ng va\u0300 \u0111oa\u0323n th\u0103\u0309ng<\/p>\n\n\n\n<p>\u0110oa\u0323n th\u0103\u0309ng c\u0103\u0301t \u0111oa\u0323n th\u0103\u0309ng. Vi\u0301 du\u0323 minh ho\u0323a:<\/p>\n\n\n\n<p>Trong hi\u0300nh 1 ta co\u0301:<\/p>\n\n\n\n<p>\u0110oa\u0323n th\u0103\u0309ng IJ va\u0300 \u0111oa\u0323n th\u0103\u0309ng KL. IJ va\u0300 KL c\u0103\u0301t nhau ta\u0323i \u0111i\u00ea\u0309m O.<\/p>\n\n\n\n<p>O co\u0300n \u0111\u01b0\u01a1\u0323c go\u0323i la\u0300 giao \u0111i\u00ea\u0309m cu\u0309a 2 \u0111\u01b0\u01a1\u0300ng th\u0103\u0309ng IJ va\u0300 KL.<\/p>\n\n\n\n<p>\u0110oa\u0323n th\u0103\u0309ng va\u0300 tia<\/p>\n\n\n\n<p>\u0110oa\u0323n th\u0103\u0309ng c\u0103\u0301t tia. Vi\u0301 du\u0323 minh ho\u0323a:<\/p>\n\n\n\n<p>\u0110oa\u0323n th\u0103\u0309ng c\u0103\u0301t tia<\/p>\n\n\n\n<p>Trong hi\u0300nh 2, ta co\u0301:<\/p>\n\n\n\n<p>\u0110oa\u0323n th\u0103\u0309ng IL va\u0300 tia Kx.<\/p>\n\n\n\n<p>IL va\u0300 Kx c\u0103\u0301t nhau ta\u0323i H.<\/p>\n\n\n\n<p>H la\u0300 giao \u0111i\u00ea\u0309m cu\u0309a \u0111oa\u0323n th\u0103\u0309ng IL va\u0300 tia Kx.<\/p>\n\n\n\n<p>\u0110oa\u0323n th\u0103\u0309ng va\u0300 \u0111\u01b0\u01a1\u0300ng th\u0103\u0309ng<\/p>\n\n\n\n<p>\u0110oa\u0323n th\u0103\u0309ng c\u0103\u0301t \u0111\u01b0\u01a1\u0300ng th\u0103\u0309ng. Vi\u0301 du\u0323 minh ho\u0323a:<\/p>\n\n\n\n<p>Trong hi\u0300nh 3, ta co\u0301:<\/p>\n\n\n\n<p>\u0110\u01b0\u01a1\u0300ng th\u0103\u0309ng x, \u0111oa\u0323n th\u0103\u0309ng AB.<\/p>\n\n\n\n<p>\u0110oa\u0323n th\u0103\u0309ng AB c\u0103\u0301t tia x ta\u0323i G.<\/p>\n\n\n\n<p>G chi\u0301nh la\u0300 giao \u0111i\u00ea\u0309m cu\u0309a \u0111oa\u0323n th\u0103\u0309ng AB va\u0300 \u0111\u01b0\u01a1\u0300ng th\u0103\u0309ng x.<\/p>\n\n\n\n<p>Tr\u01b0\u01a1\u0300ng h\u01a1\u0323p \u0111\u0103\u0323c bi\u00ea\u0323t<\/p>\n\n\n\n<p>Tr\u00ean la\u0300 ca\u0301c tr\u01b0\u01a1\u0300ng h\u01a1\u0323p th\u00f4ng th\u01b0\u01a1\u0300ng hay g\u0103\u0323p. Tr\u01b0\u01a1\u0300ng h\u01a1\u0323p \u0111\u0103\u0323c bi\u00ea\u0323t: giao \u0111i\u00ea\u0309m cu\u0309a \u0111oa\u0323n th\u0103\u0309ng co\u0301 th\u00ea\u0309 tru\u0300ng v\u01a1\u0301i mu\u0301t cu\u0309a \u0111oa\u0323n th\u0103\u0309ng ho\u0103\u0323c g\u00f4\u0301c cu\u0309a tia.<\/p>\n\n\n\n<p>Hi\u0300nh 3<\/p>\n\n\n\n<p>Trong hi\u0300nh 3, ta co\u0301:<\/p>\n\n\n\n<p>E la\u0300 giao \u0111i\u00ea\u0309m cu\u0309a \u0111oa\u0323n th\u0103\u0309ng AB va\u0300 EF. E la\u0300 mu\u0301t cu\u0309a \u0111oa\u0323n th\u0103\u0309ng EF.<\/p>\n\n\n\n<p>F la\u0300 giao \u0111i\u00ea\u0309m cu\u0309a \u0111oa\u0323n th\u0103\u0309ng AB. F la\u0300 mu\u0301t cu\u0309a tia x.<\/p>\n\n\n\n<p>\u0110\u00f4\u0323 da\u0300i \u0111oa\u0323n th\u0103\u0309ng<\/p>\n\n\n\n<p>Ca\u0301ch \u0111o<\/p>\n\n\n\n<p>S\u01b0\u0309 du\u0323ng th\u01b0\u01a1\u0301c \u0111\u00ea\u0309 \u0111o \u0111\u00f4\u0323 da\u0300i \u0111oa\u0323n th\u0103\u0309ng. \u0110\u00f4\u0323 da\u0300i \u0111\u01b0\u01a1\u0323c th\u00ea\u0309 hi\u00ea\u0323n b\u0103\u0300ng nhi\u00ea\u0300u \u0111\u01a1n vi\u0323 \u0111o nh\u01b0: mm, cm, m,\u2026<\/p>\n\n\n\n<p>Vi\u0301 du\u0323: \u0110\u00f4\u0323 da\u0300i \u0111oa\u0323n th\u0103\u0309ng AB la\u0300 10cm. Ki\u0301 hi\u00ea\u0323u: AB = 10cm<\/p>\n\n\n\n<p>L\u01b0u y\u0301:<\/p>\n\n\n\n<p>\u0110\u00f4\u0323 da\u0300i \u0111oa\u0323n th\u0103\u0309ng lu\u00f4n l\u01a1\u0301n h\u01a1n 0.<\/p>\n\n\n\n<p>A va\u0300 B tru\u0300ng nhau =&gt; \u0110\u00f4\u0323 da\u0300i AB = 0<\/p>\n\n\n\n<p>So sa\u0301nh \u0111\u00f4\u0323 da\u0300i \u0111oa\u0323n th\u0103\u0309ng<\/p>\n\n\n\n<p>Hi\u0300nh a<\/p>\n\n\n\n<p>Ta so sa\u0301nh 2 \u0111oa\u0323n th\u0103\u0309ng b\u0103\u0300ng ca\u0301ch so sa\u0301nh s\u00f4\u0301 \u0111o cu\u0309a chu\u0301ng.<\/p>\n\n\n\n<p>Hi\u0300nh a, ta co\u0301:<\/p>\n\n\n\n<p>AB = CD<\/p>\n\n\n\n<p>CD &lt; EF<\/p>\n\n\n\n<p>EF &gt; AB<\/p>\n\n\n\n<p>Luy\u00ea\u0323n t\u00e2\u0323p<\/p>\n\n\n\n<p>Ba\u0300i 1: Hoa\u0300n thi\u00ea\u0323n ch\u00f4\u0303 tr\u00f4\u0301ng trong ca\u0301c c\u00e2u sau:<\/p>\n\n\n\n<p>a. Hi\u0300nh g\u00f4\u0300m\u2026 va\u0300\u2026 \u0111\u01b0\u01a1\u0323c go\u0323i la\u0300 \u0111oa\u0323n th\u0103\u0309ng EF.<\/p>\n\n\n\n<p>b. \u2026 g\u00f4\u0300m 2 \u0111\u00e2\u0300u mu\u0301t G va\u0300 H va\u0300 ca\u0301c \u0111i\u00ea\u0309m n\u0103\u0300m gi\u01b0\u0303a.<\/p>\n\n\n\n<p>c. Hai \u0111oa\u0323n th\u0103\u0309ng c\u0103\u0301t nhau ta\u0323i\u2026<\/p>\n\n\n\n<p>d. \u2026 cu\u0309a \u0111oa\u0323n th\u0103\u0309ng va\u0300 tia la\u0300 \u0111i\u00ea\u0309m c\u0103\u0301t gi\u01b0\u0303a 2 \u0111oa\u0323n th\u0103\u0309ng va\u0300 tia ho\u0103\u0323c\u2026<\/p>\n\n\n\n<p>L\u01a1\u0300i gia\u0309i<\/p>\n\n\n\n<p>a. Hi\u0300nh g\u00f4\u0300m 2 \u0111\u00e2\u0300u mu\u0301t E va\u0300 F\/ 2 \u0111i\u00ea\u0309m E va\u0300 F va\u0300 ca\u0301c \u0111i\u00ea\u0309m n\u0103\u0300m gi\u01b0\u0303a E va\u0300 F \u0111\u01b0\u01a1\u0323c go\u0323i la\u0300 \u0111oa\u0323n th\u0103\u0309ng EF.<\/p>\n\n\n\n<p>b. \u0110oa\u0323n th\u0103\u0309ng GH g\u00f4\u0300m 2 \u0111\u00e2\u0300u mu\u0301t G va\u0300 H va\u0300 ca\u0301c \u0111i\u00ea\u0309m n\u0103\u0300m gi\u01b0\u0303a.<\/p>\n\n\n\n<p>c. Hai \u0111oa\u0323n th\u0103\u0309ng c\u0103\u0301t nhau ta\u0323i giao \u0111i\u00ea\u0309m.<\/p>\n\n\n\n<p>d. Giao \u0111i\u00ea\u0309m cu\u0309a \u0111oa\u0323n th\u0103\u0309ng va\u0300 tia la\u0300 \u0111i\u00ea\u0309m c\u0103\u0301t gi\u01b0\u0303a 2 \u0111oa\u0323n th\u0103\u0309ng va\u0300 tia ho\u0103\u0323c tru\u0300ng v\u01a1\u0301i \u0111\u00e2\u0300u mu\u0301t cu\u0309a tia ho\u0103\u0323c \u0111oa\u0323n th\u0103\u0309ng.<\/p>\n\n\n\n<p>Ba\u0300i 2: Ve\u0303 hi\u0300nh hoa\u0300n chi\u0309nh bi\u00ea\u0301t:<\/p>\n\n\n\n<p>A, B, C la\u0300 3 \u0111i\u00ea\u0309m kh\u00f4ng th\u0103\u0309ng ha\u0300ng.<\/p>\n\n\n\n<p>N\u00f4\u0301i A v\u01a1\u0301i B, B v\u01a1\u0301i C, A v\u01a1\u0301i C. Ta co\u0301 tia AB va\u0300 tia AC.<\/p>\n\n\n\n<p>Tia Ax \u0111i qua BC. Ax c\u0103\u0301t BC ta\u0323i giao \u0111i\u00ea\u0309m K.<\/p>\n\n\n\n<p>Theo em, \u0111\u00e2u la\u0300 giao \u0111i\u00ea\u0309m cu\u0309a AB, AK, AC? Chi\u0309 ra ca\u0301c tia \u0111\u00f4\u0301i nhau trong hi\u0300nh.<\/p>\n\n\n\n<p>L\u01a1\u0300i gia\u0309i:<\/p>\n\n\n\n<p>Giao \u0111i\u00ea\u0309m cu\u0309a AB, AC, AK la\u0300 A.<\/p>\n\n\n\n<p>KA va\u0300 Kx la\u0300 hai tia \u0111\u00f4\u0301i nhau.<\/p>\n\n\n\n<p>Bi\u0301 m\u00e2\u0323t Toa\u0301n ho\u0323c<\/p>\n\n\n\n<p>M\u00f4\u0323t chi\u00ea\u0301c h\u00f4\u0300 hi\u0300nh vu\u00f4ng co\u0301 b\u00f4\u0301n ca\u0301i c\u00e2y \u01a1\u0309 b\u00f4\u0301n go\u0301c. La\u0300m th\u00ea\u0309 na\u0300o \u0111\u00ea\u0309 sau khi m\u01a1\u0309 r\u00f4\u0323ng g\u00e2\u0301p \u0111\u00f4i di\u00ea\u0323n ti\u0301ch h\u00f4\u0300, h\u00f4\u0300 v\u00e2\u0303n la\u0300 hi\u0300nh vu\u00f4ng ma\u0300 kh\u00f4ng c\u00e2\u0300n ch\u0103\u0323t bo\u0309 hay \u0111\u00ea\u0309 4 ca\u0301i c\u00e2y bi\u0323 u\u0301ng n\u01b0\u01a1\u0301c?<\/p>\n\n\n\n<p>Ca\u0301c ba\u0323n \u0111a\u0303 suy nghi\u0303 \u0111\u01b0\u01a1\u0323c ra ca\u0301ch gia\u0309i quy\u00ea\u0301t v\u00e2\u0301n \u0111\u00ea\u0300 tr\u00ean ch\u01b0a? N\u00ea\u0301u ch\u01b0a ha\u0303y cu\u0303ng xem ph\u00e2\u0300n ly\u0301 gia\u0309i cu\u0309a Vietlearn ngay sau \u0111\u00e2y:<\/p>\n\n\n\n<p>Tr\u01b0\u01a1\u0301c ti\u00ean ve\u0303 chi\u00ea\u0301c h\u00f4\u0300 hi\u0300nh vu\u00f4ng l\u00ean gi\u00e2\u0301y ki\u0301 hi\u00ea\u0323u la\u0300 ABCD. N\u00f4\u0301i AC va\u0300 BD. \u0110i\u00ea\u0309m giao gi\u01b0\u0303a AC va\u0300 BD la\u0300 O.<\/p>\n\n\n\n<p>Ta\u0323i \u0111i\u00ea\u0309m A va\u0300 \u0111i\u00ea\u0309m C ta ve\u0303 ca\u0301c \u0111\u01b0\u01a1\u0300ng th\u0103\u0309ng song song v\u01a1\u0301i BD. T\u01b0\u01a1ng t\u01b0\u0323, ta\u0323i \u0111i\u00ea\u0309m B va\u0300 D ta cu\u0303ng ve\u0303 ca\u0301c \u0111\u01b0\u01a1\u0300ng th\u0103\u0309ng song song v\u01a1\u0301i v\u01a1\u0301i AC. Ta\u0323i \u0111i\u00ea\u0309m giao nhau cu\u0309a 4 \u0111\u01b0\u01a1\u0300ng th\u0103\u0309ng l\u00e2\u0300n l\u01b0\u01a1\u0323t la\u0300: E, F, G, H. Ta \u0111\u01b0\u01a1\u0323c EFGH la\u0300 hi\u0300nh vu\u00f4ng.<\/p>\n\n\n\n<p>Hi\u0300nh vu\u00f4ng EFGH chi\u0301nh la\u0300 l\u01a1\u0300i gia\u0309i cho ba\u0300i toa\u0301n tr\u00ean. Ta kh\u00f4ng c\u00e2\u0300n ch\u0103\u0323t c\u00e2y ma\u0300 v\u00e2\u0303n m\u01a1\u0309 r\u00f4\u0323ng \u0111\u01b0\u01a1\u0323c g\u00e2\u0301p \u0111\u00f4i di\u00ea\u0323n ti\u0301ch h\u00f4\u0300. C\u01a1 s\u01a1\u0309 \u0111\u00ea\u0309 kh\u0103\u0309ng \u0111i\u0323nh EFGH co\u0301 di\u00ea\u0323n ti\u0301ch g\u00e2\u0301p \u0111\u00f4i ABCD la\u0300:<\/p>\n\n\n\n<p>Ta co\u0301: AC va\u0300 BD la\u0300 \u0111\u01b0\u01a1\u0300ng che\u0301o cu\u0309a hi\u0300nh vu\u00f4ng ABCD =&gt; AC vu\u00f4ng go\u0301c v\u01a1\u0301i BD<\/p>\n\n\n\n<p>La\u0323i co\u0301: EF va\u0300 GH \u0111\u00ea\u0300u song song v\u01a1\u0301i BD.<\/p>\n\n\n\n<p>=&gt; AC vu\u00f4ng go\u0301c v\u01a1\u0301i EF va\u0300 GH<\/p>\n\n\n\n<p>=&gt; AE = AF = CG = CH =&gt; A va\u0300 C la\u0300 trung \u0111i\u00ea\u0309m cu\u0309a EF va\u0300 GH.<\/p>\n\n\n\n<p>T\u01b0\u01a1ng t\u01b0\u0323 nh\u01b0 tr\u00ean ta co\u0301 B va\u0300 D la\u0300 trung \u0111i\u00ea\u0309m cu\u0309a FG va\u0300 EH.<\/p>\n\n\n\n<p>Tam gia\u0301c vu\u00f4ng AOB va\u0300 tam gia\u0301c vu\u00f4ng AFB co\u0301 AF = OB = FB = DA =&gt; Di\u00ea\u0323n ti\u0301ch hai tam gia\u0301c b\u0103\u0300ng nhau.<\/p>\n\n\n\n<p>Ma\u0300: Di\u00ea\u0323n ti\u0301ch hi\u0300nh vu\u00f4ng ABCD b\u0103\u0300ng 4 l\u00e2\u0300n di\u00ea\u0323n ti\u0301ch tam gia\u0301c AOB.<\/p>\n\n\n\n<p>Di\u00ea\u0323n ti\u0301ch hi\u0300nh vu\u00f4ng EFGH b\u0103\u0300ng 8 l\u00e2\u0300n di\u00ea\u0323n ti\u0301ch tam gia\u0301c AOB.<\/p>\n\n\n\n<p>Nh\u01b0 v\u00e2\u0323y di\u00ea\u0323n ti\u0301ch hi\u0300nh vu\u00f4ng EFGH g\u00e2\u0301p \u0111\u00f4i di\u00ea\u0323n ti\u0301ch hi\u0300nh vu\u00f4ng ABCD.<\/p>\n\n\n\n<p>H\u1ecdc t\u1ed1t l\u1edbp 7<\/p>\n\n\n\n<p>L\u01a1\u0300i k\u00ea\u0301t<\/p>\n\n\n\n<p>Vietlearn hy vo\u0323ng v\u01a1\u0301i ba\u0300i vi\u00ea\u0301t tr\u00ean \u0111a\u0303 giu\u0301p ca\u0301c ba\u0323n ho\u0323c sinh n\u0103\u0301m \u0111\u01b0\u01a1\u0323c ca\u0301c ki\u00ea\u0301n th\u01b0\u0301c v\u00ea\u0300 \u0111oa\u0323n th\u0103\u0309ng l\u01a1\u0301p 6. Ki\u00ea\u0301n th\u01b0\u0301c v\u00ea\u0300 \u0111oa\u0323n th\u0103\u0309ng l\u01a1\u0301p 6 kh\u00f4ng h\u00ea\u0300 kho\u0301 pha\u0309i kh\u00f4ng na\u0300o? Ba\u0323n ca\u0309m th\u00e2\u0301y Toa\u0301n la\u0300 m\u00f4n ho\u0323c kho\u0301? Toa\u0301n la\u0300 n\u00f4\u0303i s\u01a1\u0323 ha\u0303i cu\u0309a ba\u0309n th\u00e2n? Vietlearn la\u0300 gia\u0309i pha\u0301p h\u01b0\u0303u i\u0301ch \u0111\u00ea\u0309 gia\u0309i quy\u00ea\u0301t tri\u00ea\u0323t \u0111\u00ea\u0309 v\u00e2\u0301n \u0111\u00ea\u0300 na\u0300y.<\/p>\n\n\n\n<p><a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">Gia s\u01b0<\/a> Vietlearn \u2013 <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">Gia s\u01b0<\/a> cu\u0309a mo\u0323i nha\u0300<\/p>\n\n\n\n<p>Vietlearn la\u0300 <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">gia s\u01b0<\/a> tr\u01b0\u0323c tuy\u00ea\u0301n ta\u0323i nha\u0300 s\u00f4\u0301 1 ta\u0323i Vi\u00ea\u0323t Nam hi\u00ea\u0323n nay. Vietlearn cung c\u00e2\u0301p cho ba\u0323n nh\u01b0\u0303ng tra\u0309i nghi\u00ea\u0323m \u0111\u0103\u0323c bi\u00ea\u0323t. V\u01a1\u0301i l\u00f4\u0323 tri\u0300nh ho\u0323c t\u00e2\u0323p \u0111\u01b0\u01a1\u0323c ca\u0301 nh\u00e2n ho\u0301a th\u00f4ng qua AI ph\u00e2n ti\u0301ch k\u00ea\u0301t qua\u0309 ho\u0323c, \u01b0u \u0111i\u00ea\u0309m va\u0300 ha\u0323n ch\u00ea\u0301,\u2026 cu\u0309a t\u01b0\u0300ng ca\u0301 nh\u00e2n. Tham gia ngay khoa\u0301 ho\u0323c m\u00f4n Toa\u0301n K-12 cu\u0309a Vietlearn. Kho\u0301a ho\u0323c K12 v\u01a1\u0301i ca\u0301c m\u00f4n: Toa\u0301n ho\u0323c, V\u00e2\u0323t Ly\u0301, Ho\u0301a ho\u0323c, Ti\u00ea\u0301ng Anh da\u0300nh cho ca\u0301c ba\u0323n ho\u0323c sinh t\u01b0\u0300 l\u01a1\u0301p 1 \u0111\u00ea\u0301n l\u01a1\u0301p 12. Ba\u0300i gia\u0309ng \u0111\u01b0\u01a1\u0323c thi\u00ea\u0301t k\u00ea\u0301 tr\u01b0\u0323c quan, h\u01b0\u0301a he\u0323n mang \u0111\u00ea\u0301n tra\u0309i nghi\u00ea\u0323m tuy\u00ea\u0323t v\u01a1\u0300i, kh\u01a1i g\u01a1\u0323i ca\u0309m h\u01b0\u0301ng ho\u0323c t\u00e2\u0323p.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>H\u1ecdc To\u00e1n : L\u00e0m quen v\u1edbi s\u1ed1 nguy\u00ean \u00e2m<\/p>\n\n\n\n<p>Ho\u0323c Toa\u0301n 6 cu\u0300ng Vietlearn: Ly\u0301 thuy\u00ea\u0301t va\u0300 ba\u0300i t\u00e2\u0323p v\u00ea\u0300 tia<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"<p>Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn \u01a0\u0309 ba\u0300i tr\u01b0\u01a1\u0301c, chu\u0301ng ta \u0111a\u0303 cu\u0300ng ti\u0300m hi\u00ea\u0309u ca\u0301c ki\u00ea\u0301n th\u01b0\u0301c v\u00ea\u0300 tia. Ba\u0300i vi\u00ea\u0301t na\u0300y chu\u0301ng ta se\u0303 ti\u00ea\u0301p tu\u0323c ti\u0300m hi\u00ea\u0309u v\u00ea\u0300 ki\u00ea\u0301n th\u01b0\u0301c v\u00ea\u0300 \u0111oa\u0323n th\u0103\u0309ng l\u01a1\u0301p 6 va\u0300 ca\u0301ch \u0111o \u0111\u00f4\u0323 da\u0300i. \u0110oa\u0323n th\u0103\u0309ng va\u0300 \u0111o \u0111\u00f4\u0323 da\u0300i \u0111oa\u0323n th\u0103\u0309ng la\u0300 m\u00f4\u0323t trong nh\u01b0\u0303ng [&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":[9,4],"tags":[],"class_list":["post-2627","post","type-post","status-publish","format-standard","hentry","category-toan-hoc","category-trung-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/2627","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=2627"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/2627\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=2627"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=2627"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=2627"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}