{"id":1059,"date":"2021-10-08T13:08:09","date_gmt":"2021-10-08T13:08:09","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=1059"},"modified":"2021-10-14T22:10:35","modified_gmt":"2021-10-14T15:10:35","slug":"tu-giac-la-gi-nhung-hinh-tu-giac-pho-bien-hien-nay","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/tu-giac-la-gi-nhung-hinh-tu-giac-pho-bien-hien-nay\/","title":{"rendered":"T\u1ee9 gi\u00e1c l\u00e0 g\u00ec? Nh\u1eefng h\u00ecnh t\u1ee9 gi\u00e1c ph\u1ed5 bi\u1ebfn hi\u1ec7n nay"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00ecnh t\u1ee9 gi\u00e1c l\u00e0 m\u1ed9t trong nh\u1eefng lo\u1ea1i h\u00ecnh h\u1ecdc ph\u1ed5 bi\u1ebfn m\u00e0 c\u00e1c em s\u1ebd b\u1eaft \u0111\u1ea7u l\u00e0m quen \u1edf l\u1edbp 2. C\u00f9ng t\u00ecm hi\u1ec3u v\u1ec1 \u0111\u1ecbnh ngh\u0129a t\u1ee9 gi\u00e1c l\u00e0 g\u00ec? C\u00e1c lo\u1ea1i t\u1ee9 gi\u00e1c ph\u1ed5 bi\u1ebfn v\u00e0 \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a ch\u00fang ra sao? Trong n\u1ed9i dung b\u00e0i vi\u1ebft sau \u0111\u00e2y Vietlearn s\u1ebd gi\u00fap b\u1ea1n t\u1ed5ng h\u1ee3p l\u1ea1i nh\u1eefng ki\u1ebfn th\u1ee9c v\u1ec1 ch\u1ee7 \u0111\u1ec1 n\u00e0y.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00ecnh t\u1ee9 gi\u00e1c l\u00e0 g\u00ec?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ecbnh ngh\u0129a h\u00ecnh t\u1ee9 gi\u00e1c l\u00e0 g\u00ec?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1ee9 gi\u00e1c l\u00e0 m\u1ed9t \u0111a gi\u00e1c c\u00f3 4 c\u1ea1nh v\u00e0 4 \u0111\u1ec9nh. T\u1ed5ng c\u00e1c g\u00f3c c\u1ee7a t\u1ee9 gi\u00e1c l\u00e0 360 \u0111\u1ed9. C\u00f3 nhi\u1ec1u lo\u1ea1i t\u1ee9 gi\u00e1c kh\u00e1c nhau. C\u00f3 th\u1ec3 l\u00e0 t\u1ee9 gi\u00e1c ho\u1eb7c t\u1ee9 gi\u00e1c k\u00e9p. Trong t\u1ee9 gi\u00e1c \u0111\u01a1n l\u1ea1i c\u00f3 l\u1ed3i ho\u1eb7c l\u00f5m.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ti\u0301nh ch\u00e2\u0301t cu\u0309a hi\u0300nh t\u01b0\u0301 gia\u0301c l\u00e0 g\u00ec?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Hi\u0300nh t\u01b0\u0301 gia\u0301c s\u1ebd g\u00f4\u0300m co\u0301 2 ti\u0301nh ch\u00e2\u0301t \u0111o\u0301 la\u0300:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ti\u0301nh ch\u00e2\u0301t 1:Ti\u0301nh ch\u00e2\u0301t hi\u0300nh che\u0301o<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Hai \u0111\u01b0\u1eddng ch\u00e9o c\u1ee7a t\u1ee9 gi\u00e1c l\u1ed3i s\u1ebd g\u1eb7p nhau t\u1ea1i m\u1ed9t \u0111i\u1ec3m thu\u1ed9c mi\u1ec1n trong c\u1ee7a t\u1ee9 gi\u00e1c \u0111\u00f3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ng\u01b0\u1ee3c l\u1ea1i, m\u1ed9t t\u1ee9 gi\u00e1c c\u00f3 hai \u0111\u01b0\u1eddng ch\u00e9o c\u1eaft nhau t\u1ea1i m\u1ed9t \u0111i\u1ec3m thu\u1ed9c mi\u1ec1n trong c\u1ee7a n\u00f3 th\u00ec \u0111\u00f3 ch\u00ednh l\u00e0 t\u1ee9 gi\u00e1c l\u1ed3i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ti\u0301nh ch\u00e2\u0301t 2: Ti\u0301nh ch\u00e2\u0301t go\u0301c cu\u0309a hi\u0300nh t\u01b0\u0301 gia\u0301c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u01b0 \u0111\u00e3 n\u00f3i \u1edf tr\u00ean, t\u1ed5ng c\u00e1c g\u00f3c c\u1ee7a t\u1ee9 gi\u00e1c b\u0103\u0300ng 360 \u0111\u1ed9. Cho d\u00f9 l\u00e0 t\u1ee9 gi\u00e1c l\u1ed3i hay l\u00f5m, \u0111\u01a1n hay k\u00e9p th\u00ec khi c\u1ed9ng t\u1ed5ng c\u1ee7a 4 g\u00f3c c\u0169ng s\u1ebd b\u1eb1ng 360 \u0111\u1ed9.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c lo\u1ea1i h\u00ecnh t\u1ee9 gi\u00e1c ph\u1ed5 bi\u1ebfn<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c d\u1ea1ng t\u1ee9 gi\u00e1c th\u01b0\u1eddng g\u1eb7p<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c h\u00ecnh t\u1ee9 gi\u00e1c l\u1edbp 8 th\u01b0\u1eddng g\u1eb7p g\u1ed3m:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1ee9 gi\u00e1c \u0111\u01a1n: l\u00e0 nh\u1eefng t\u1ee9 gi\u00e1c kh\u00f4ng c\u00f3 c\u1ea1nh n\u00e0o c\u1eaft nhau.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1ee9 gi\u00e1c l\u1ed3i: l\u00e0 t\u1ee9 gi\u00e1c m\u00e0 t\u1ea5t c\u1ea3 c\u00e1c g\u00f3c mi\u1ec1n trong n\u00f3 \u0111\u1ec1u nh\u1ecf h\u01a1n 180\u00b0. \u0110\u1ed3ng th\u1eddi hai \u0111\u01b0\u1eddng ch\u00e9o \u0111\u1ec1u n\u1eb1m ph\u00eda b\u00ean trong c\u1ee7a t\u1ee9 gi\u00e1c. Hay hi\u1ec3u c\u00e1ch kh\u00e1c th\u00ec t\u1ee9 gi\u00e1c l\u1ed3i s\u1ebd lu\u00f4n n\u1eb1m g\u1ecdn trong m\u1ed9t n\u1eeda m\u1eb7t ph\u1eb3ng c\u00f3 ch\u1ee9a b\u1ea5t k\u1ef3 c\u1ea1nh n\u00e0o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1ee9 gi\u00e1c l\u00f5m: l\u00e0 t\u1ee9 gi\u00e1c ch\u1ee9a m\u1ed9t g\u00f3c trong c\u00f3 s\u1ed1 \u0111o l\u1edbn h\u01a1n 180\u00b0. \u0110\u1ed3ng th\u1eddi, m\u1ed9t trong hai \u0111\u01b0\u1eddng ch\u00e9o c\u1ee7a h\u00ecnh \u0111\u00f3 n\u1eb1m b\u00ean ngo\u00e0i t\u1ee9 gi\u00e1c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1ee9 gi\u00e1c kh\u00f4ng \u0111\u1ec1u: l\u00e0 t\u1ee9 gi\u00e1c kh\u00f4ng c\u00f3 b\u1ea5t c\u1ee9 c\u1eb7p c\u1ea1nh n\u00e0o song song v\u1edbi nhau. \u0110\u00e2y ch\u00ednh l\u00e0 \u0111\u1ea1i di\u1ec7n c\u1ee7a t\u1ee9 gi\u00e1c l\u1ed3i n\u00f3i chung ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t lo\u1ea1i t\u1ee9 gi\u00e1c \u0111\u1eb7c bi\u1ec7t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D\u00f9 c\u00f3 4 lo\u1ea1i h\u00ecnh t\u1ee9 gi\u00e1c kh\u00e1c nhau nh\u01b0ng khi h\u1ecdc v\u00e0 l\u00e0m c\u00e1c b\u00e0i t\u1eadp To\u00e1n 8 t\u1ee9 gi\u00e1c th\u00ec ch\u00fang ta s\u1ebd hi\u1ec3u \u0111\u00f3 ch\u00ednh l\u00e0 t\u1ee9c gi\u00e1c l\u1ed3i<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u00e2n bi\u1ec7t c\u00e1c lo\u1ea1i h\u00ecnh t\u1ee9 gi\u00e1c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c h\u00ecnh t\u1ee9 gi\u00e1c \u0111\u1eb7c bi\u1ec7t<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sau khi \u0111\u00e3 t\u00ecm hi\u1ec3u t\u1ee9 gi\u00e1c l\u00e0 g\u00ec c\u0169ng nh\u01b0 l\u00e0m quen v\u1edbi c\u00e1c lo\u1ea1i t\u1ee9 gi\u00e1c, h\u00e3y c\u00f9ng \u0111i\u1ec3m qua c\u00e1c lo\u1ea1i t\u1ee9 gi\u00e1c \u0111\u1eb7c bi\u1ec7t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00ecnh thang<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00ecnh thang: l\u00e0 h\u00ecnh t\u1ee9 gi\u00e1c t\u1ed3n t\u1ea1i \u00edt nh\u1ea5t 2 c\u1ea1nh \u0111\u1ed1i song song v\u1edbi nhau.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong h\u00ecnh tr\u00ean ta th\u1ea5y, H\u00ecnh thang ABCD c\u00f3 2 c\u1eb7p c\u1ea1nh \u0111\u1ed1i l\u00e0 AB v\u00e0 DC, AB \/\/ DC.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00ecnh thang c\u00e2n: l\u00e0 h\u00ecnh thang c\u00f3 2 g\u00f3c k\u1ec1 c\u00f9ng m\u1ed9t c\u1ea1nh \u0111\u00e1y b\u1eb1ng nhau. H\u00ecnh thang n\u00e0y c\u0169ng s\u1ebd c\u00f3 2 \u0111\u01b0\u1eddng ch\u00e9o b\u1eb1ng nhau.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e2y ch\u00ednh l\u00e0 v\u00ed d\u1ee5 v\u1ec1 h\u00ecnh thang c\u00e2n. H\u00ecnh thang c\u00e2n ABCD c\u00f3 AD \/\/ BC v\u00e0 2 g\u00f3c k\u1ec1 c\u00f9ng c\u1ea1nh \u0111\u00e1y DC b\u1eb1ng nhau.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00ecnh b\u00ecnh h\u00e0nh<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00ecnh b\u00ecnh h\u00e0nh: l\u00e0 h\u00ecnh t\u1ee9 gi\u00e1c t\u1ed3n t\u1ea1i 2 c\u1eb7p c\u1ea1nh \u0111\u1ed1i song song v\u1edbi nhau. Trong h\u00ecnh b\u00ecnh h\u00e0nh th\u00ec c\u00e1c c\u1ea1nh \u0111\u1ed1i b\u1eb1ng nhau, c\u00e1c g\u00f3c \u0111\u1ed1i b\u1eb1ng nhau. \u0110\u01b0\u1eddng ch\u00e9o c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh c\u1eaft nhau t\u1ea1i trung \u0111i\u1ec3m c\u1ee7a m\u1ed7i \u0111\u01b0\u1eddng. \u0110\u00e2y l\u00e0 tr\u01b0\u1eddng h\u1ee3p \u0111\u1eb7c bi\u1ec7t c\u1ee7a h\u00ecnh thang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00ecnh b\u00ecnh h\u00e0nh ABCD ph\u00eda tr\u00ean c\u00f3 2 c\u1eb7p c\u1ea1nh \u0111\u1ed1i song song: AB\/\/ DC; AD\/\/BC<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00ecnh thoi: l\u00e0 h\u00ecnh t\u1ee9 gi\u00e1c c\u00f3 4 c\u1ea1nh b\u1eb1ng nhau. \u0110\u1ed3ng th\u1eddi 2 \u0111\u01b0\u1eddng ch\u00e9o vu\u00f4ng g\u00f3c t\u1ea1i trung \u0111i\u1ec3m m\u1ed7i \u0111\u01b0\u1eddng v\u00e0 c\u00e1c \u0111\u01b0\u1eddng ch\u00e9o n\u00e0y c\u0169ng l\u00e0 \u0111\u01b0\u1eddng ph\u00e2n gi\u00e1c c\u00e1c g\u00f3c. \u0110\u00e2y c\u0169ng l\u00e0 m\u1ed9t tr\u01b0\u1eddng h\u1ee3p \u0111\u1eb7c bi\u1ec7t c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00ecnh ch\u1eef nh\u1eadt<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00ecnh ch\u1eef nh\u1eadt: l\u00e0 h\u00ecnh t\u1ee9 gi\u00e1c c\u00f3 4 g\u00f3c vu\u00f4ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00ecnh ch\u1eef nh\u1eadt c\u0169ng l\u00e0 h\u00ecnh c\u00f3 2 \u0111\u01b0\u1eddng ch\u00e9o b\u1eb1ng nhau. Ch\u00fang c\u1eaft nhau t\u1ea1i trung \u0111i\u1ec3m c\u1ee7a m\u1ed7i \u0111\u01b0\u1eddng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00ecnh vu\u00f4ng: L\u00e0 h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 4 c\u1ea1nh b\u1eb1ng nhau. H\u00ecnh vu\u00f4ng c\u00f3 c\u00e1c c\u1ea1nh \u0111\u1ed1i song song c\u0169ng l\u00e0 m\u1ed9t h\u00ecnh b\u00ecnh h\u00e0nh. C\u00e1c \u0111\u01b0\u1eddng ch\u00e9o b\u1eb1ng nhau v\u00e0 vu\u00f4ng g\u00f3c v\u1edbi nhau t\u1ea1i trung \u0111i\u1ec3m.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t t\u1ee9 gi\u00e1c l\u00e0 m\u1ed9t h\u00ecnh vu\u00f4ng n\u1ebfu v\u00e0 ch\u1ec9 n\u1ebfu n\u00f3 v\u1eeba l\u00e0 m\u1ed9t h\u00ecnh thoi v\u1eeba l\u00e0 m\u1ed9t h\u00ecnh ch\u1eef nh\u1eadt. T\u1ee9c l\u00e0 b\u1ed1n c\u1ea1nh b\u1eb1ng nhau v\u00e0 b\u1ed1n g\u00f3c b\u1eb1ng nhau.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1ee9 gi\u00e1c n\u1ed9i ti\u1ebfp\/ t\u1ee9 gi\u00e1c \u0111i\u1ec1u h\u00f2a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1ee9 gi\u00e1c \u0111i\u1ec1u h\u00f2a hay t\u1ee9 gi\u00e1c n\u1ed9i ti\u1ebfp l\u00e0 h\u00ecnh t\u1ee9 gi\u00e1c c\u00f3 c\u1ea3 4 \u0111\u1ec9nh n\u1eb1m tr\u00ean 1 \u0111\u01b0\u1eddng trong. Ch\u00fang ta g\u1ecdi \u0111\u01b0\u1eddng tr\u00f2n n\u00e0y l\u00e0 \u0111\u01b0\u1eddng tr\u00f2n ngo\u1ea1i ti\u1ebfp c\u00f2n c\u00e1c \u0111\u1ec9nh c\u1ee7a t\u1ee9 gi\u00e1c l\u00e0 \u0111\u1ed3ng vi\u00ean.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00e2m c\u1ee7a \u0111\u01b0\u1eddng tr\u00f2n g\u1ecdi l\u00e0 t\u00e2m \u0111\u01b0\u1eddng tr\u00f2n ngo\u1ea1i ti\u1ebfp.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e1n k\u00ednh \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 b\u00e1n k\u00ednh ngo\u1ea1i ti\u1ebfp.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u00f4ng th\u01b0\u1eddng th\u00ec t\u1ee9 gi\u00e1c n\u1ed9i ti\u1ebfp l\u00e0 t\u1ee9 gi\u00e1c l\u1ed3i. Tuy nhi\u00ean c\u0169ng s\u1ebd t\u1ed3n t\u1ea1i c\u00e1c t\u1ee9 gi\u00e1c n\u1ed9i ti\u1ebfp l\u00f5m.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1ch v\u1ebd t\u1ee9 gi\u00e1c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1ch v\u1ebd t\u1ee9 gi\u00e1c l\u00e0 g\u00ec? Ch\u00fang ta c\u00f3 3 c\u00e1ch v\u1ebd t\u1ee9 gi\u00e1c l\u00e0:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1ch v\u1ebd 1: L\u1ea5y b\u1ed1n \u0111i\u1ec3m ph\u00e2n bi\u1ec7t v\u00e0 n\u1ed1i l\u1ea1i. Tuy nhi\u00ean n\u1ebfu v\u1ebd theo c\u00e1ch n\u00e0y kh\u00f4ng th\u1ec3 lu\u00f4n lu\u00f4n x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c m\u1ed9t t\u1ee9 gi\u00e1c l\u1ed3i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1ch v\u1ebd 2: C\u1eaft m\u1ed9t tam gi\u00e1c b\u1edfi m\u1ed9t c\u00e1t tuy\u1ebfn kh\u00f4ng \u0111i qua \u0111\u1ec9nh.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1ch v\u1ebd 3: V\u1ebd tr\u01b0\u1edbc m\u1ed9t tam gi\u00e1c ABD, sau \u0111\u00f3 v\u1ebd th\u00eam tr\u00ean h\u00ecnh \u0111\u00f3 tam gi\u00e1c BCD sao cho \u0111i\u1ec3m C n\u1eb1m kh\u00e1c ph\u00eda v\u1edbi \u0111i\u1ec3m A so v\u1edbi b\u1edd BD v\u00e0 C kh\u00f4ng thu\u1ed9c AB, AD.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1ch g\u1ecdi t\u00ean t\u1ee9 gi\u00e1c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ch\u00fang ta g\u1ecdi t\u00ean c\u1ee7a t\u1ee9 gi\u00e1c ph\u1ea3i \u0111\u01b0\u1ee3c \u0111\u1ecdc theo \u0111\u00fang th\u1ee9 t\u1ef1 nh\u01b0 sau:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u00ean \u0111\u00e2y l\u00e0 t\u1ed5ng h\u1ee3p c\u00e1c th\u00f4ng tin c\u01a1 b\u1ea3n nh\u1ea5t li\u00ean quan \u0111\u1ebfn t\u1ee9 gi\u00e1c l\u00e0 g\u00ec. \u0110\u1ec3 t\u00ecm hi\u1ec3u th\u00eam c\u00e1c ki\u1ebfn th\u1ee9c to\u00e1n h\u1ecdc, b\u1ea1n c\u00f3 th\u1ec3 truy c\u1eadp v\u00e0o \u0111\u1ecba ch\u1ec9: Vietlearn.org\/.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u01b0\u1eddng trung b\u00ecnh c\u1ee7a h\u00ecnh thang<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bi\u1ebfn \u0111\u1ed5i c\u00e1c bi\u1ec3u th\u1ee9c h\u1eefu t\u1ec9<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Di\u1ec7n t\u00edch h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt \u2013 B\u01b0\u1edbc \u0111\u1ea7u h\u1ecdc h\u00ecnh kh\u00f4ng gian<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"<p>Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn H\u00ecnh t\u1ee9 gi\u00e1c l\u00e0 m\u1ed9t trong nh\u1eefng lo\u1ea1i h\u00ecnh h\u1ecdc ph\u1ed5 bi\u1ebfn m\u00e0 c\u00e1c em s\u1ebd b\u1eaft \u0111\u1ea7u l\u00e0m quen \u1edf l\u1edbp 2. C\u00f9ng t\u00ecm hi\u1ec3u v\u1ec1 \u0111\u1ecbnh ngh\u0129a t\u1ee9 gi\u00e1c l\u00e0 g\u00ec? C\u00e1c lo\u1ea1i t\u1ee9 gi\u00e1c ph\u1ed5 bi\u1ebfn v\u00e0 \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a ch\u00fang ra sao? Trong n\u1ed9i dung [&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],"tags":[],"class_list":["post-1059","post","type-post","status-publish","format-standard","hentry","category-toan-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/1059","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=1059"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/1059\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=1059"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=1059"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=1059"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}