{"id":2541,"date":"2021-10-14T21:02:51","date_gmt":"2021-10-14T14:02:51","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=2541"},"modified":"2021-10-14T22:11:16","modified_gmt":"2021-10-14T15:11:16","slug":"tam-giac-can-va-kien-thuc-co-ban-toan-lop-7-la-chuyen-nho","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/tam-giac-can-va-kien-thuc-co-ban-toan-lop-7-la-chuyen-nho\/","title":{"rendered":"Tam gi\u00e1c c\u00e2n v\u00e0 ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n \u2013 To\u00e1n l\u1edbp 7 l\u00e0 chuy\u1ec7n nh\u1ecf"},"content":{"rendered":"\n<p>Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn<\/p>\n\n\n\n<p>Th\u1ebf n\u00e0o \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 tam gi\u00e1c c\u00e2n? Tam gi\u00e1c \u0111\u1ec1u l\u00e0 g\u00ec? \u0110\u1eb7c \u0111i\u1ec3m v\u00e0 t\u00ednh ch\u1ea5t c\u1ee7a tam gi\u00e1c \u0111\u1ec1u? \u0110\u00e2y \u0111\u1ec1u l\u00e0 nh\u1eefng lo\u1ea1i tam gi\u00e1c \u0111\u1eb7c bi\u1ec7t, \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng nhi\u1ec1u trong h\u00ecnh h\u1ecdc t\u1eeb b\u1eadc THCS t\u1edbi THPT v\u00e0 c\u1ea3 nh\u1eefng c\u1ea5p h\u1ecdc cao h\u01a1n. Do \u0111\u00f3, n\u1eafm v\u1eefng n\u1ed9i dung ki\u1ebfn th\u1ee9c v\u1ec1 c\u00e1c lo\u1ea1i tam gi\u00e1c n\u00e0y gi\u00fap b\u1ea1n x\u00e2y d\u1ee5ng n\u1ec1n t\u1ea3ng ch\u1eafc ch\u1eafn, t\u1ef1 tin \u1edf nh\u1eefng b\u1eadc h\u1ecdc cao h\u01a1n. H\u00e3y theo ch\u00e2n Vietlearn, ch\u00fang ta s\u1ebd c\u00f9ng gi\u1ea3i \u0111\u00e1p n\u1ed9i dung b\u00e0i h\u1ecdc trong b\u00e0i vi\u1ebft ngay sau \u0111\u00e2y.<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>\u0110\u1ecbnh ngh\u0129a v\u1ec1 tam gi\u00e1c c\u00e2n<\/li><\/ol>\n\n\n\n<p>Ta c\u00f3 \u0111\u1ecbnh ngh\u0129a:<\/p>\n\n\n\n<p>X\u00e9t trong tam gi\u00e1c c\u00e2n ABC c\u00f3 c\u1ea1nh AB v\u00e0 AC b\u1eb1ng nhau.<\/p>\n\n\n\n<p>Ta n\u00f3i c\u1ea1nh AB v\u00e0 AC l\u00e0 c\u00e1c c\u1ea1nh b\u00ean<\/p>\n\n\n\n<p>C\u1ea1nh BC \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 c\u1ea1nh \u0111\u00e1y<\/p>\n\n\n\n<p>G\u00f3c A l\u00e0 g\u00f3c \u0111\u1ec9nh<\/p>\n\n\n\n<p>G\u00f3c B v\u00e0 g\u00f3c C l\u00e0 g\u00f3c \u1edf \u0111\u00e1y<\/p>\n\n\n\n<p>Nh\u1eadn x\u00e9t: tr\u01b0\u1eddng h\u1ee3p \u0111\u1eb7c bi\u1ec7t, tam giac c\u00e2n c\u00f3 hai c\u1ea1nh b\u00ean v\u00e0 c\u1ea1nh \u0111\u00e1y b\u1eb1ng nhau<\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"2\"><li>T\u00ednh ch\u1ea5t c\u1ee7a tam gi\u00e1c c\u00e2n<\/li><\/ol>\n\n\n\n<p>V\u00ed d\u1ee5:<\/p>\n\n\n\n<p>Cho tam gi\u00e1c MNO c\u00e2n t\u1ea1i M, tia ph\u00e2n gi\u00e1c g\u00f3c M c\u00e1c NO t\u1ea1i P<\/p>\n\n\n\n<p>H\u00e3y so s\u00e1nh s\u1ed1 \u0111o g\u00f3c MNP v\u00e0 MOP<\/p>\n\n\n\n<p>=&gt; Ta nh\u1eadn th\u1ea5y MNP v\u00e0 MOP b\u1eb1ng nhau<\/p>\n\n\n\n<p>=&gt; \u0110\u1ecbnh l\u00fd 1:<\/p>\n\n\n\n<p>Nh\u1eadn x\u00e9t: Tr\u01b0\u1eddng h\u1ee3p \u0111\u1eb7c bi\u1ec7t, n\u1ebfu hai g\u00f3c \u1edf \u0111\u00e1y c\u1ee7a 1 tam gi\u00e1c c\u00e2n b\u1eb1ng 60 th\u00ec g\u00f3c \u1edf \u0111\u1ec9nh c\u0169ng b\u1eb1ng 60<\/p>\n\n\n\n<p>=&gt; \u0110\u1ecbnh l\u00fd 2:<\/p>\n\n\n\n<p>Tr\u01b0\u1eddng h\u1ee3p \u0111\u1eb7c bi\u1ec7t: N\u1ebfu tam gi\u00e1c v\u1eeba vu\u00f4ng v\u1eeba c\u00e2n, ch\u1ec9 c\u00f3 duy nh\u1ea5t tr\u01b0\u1eddng h\u1ee3p l\u00e0 hai c\u1ea1nh g\u00f3c vu\u00f4ng b\u1eb1ng nhau.<\/p>\n\n\n\n<p>Ch\u1ee9ng minh:<\/p>\n\n\n\n<p>Ta c\u00f3: B\u00ecnh ph\u01b0\u01a1ng chi\u1ec1u d\u00e0i c\u1ea1nh huy\u1ec1n lu\u00f4n trong tam gi\u00e1c vu\u00f4ng lu\u00f4n lu\u00f4n b\u1eb1ng t\u1ed5ng b\u00ecnh ph\u01b0\u01a1ng hai c\u1ea1nh g\u00f3c vu\u00f4ng do \u0111\u00f3 n\u1ebfu 1 c\u1ea1nh g\u00f3c vu\u00f4ng b\u1eb1ng c\u1ea1nh huy\u1ec1n th\u00ec c\u1ea1nh c\u00f2n l\u1ea1i b\u1eb1ng 0 =&gt; kh\u00f4ng th\u1ecfa m\u00e3n.<\/p>\n\n\n\n<p>B\u00e0i t\u1eadp v\u1eadn d\u1ee5ng:<\/p>\n\n\n\n<p>T\u00ednh s\u1ed1 \u0111o c\u00e1c g\u00f3c nh\u1ecdn trong tam gi\u00e1c vu\u00f4ng c\u00e2n:<\/p>\n\n\n\n<p>Trong tam gi\u00e1c vu\u00f4ng c\u00e2n, ta c\u00f3 s\u1ed1 \u0111o c\u00e1c g\u00f3c nh\u1ecdn b\u1eb1ng nhau.<\/p>\n\n\n\n<p>G\u00f3c \u0111\u1ec9nh = 90<\/p>\n\n\n\n<p>M\u00e0 t\u1ed5ng ba g\u00f3c = 180<\/p>\n\n\n\n<p>=&gt; s\u1ed1 \u0111o m\u1ed7i g\u00f3c nh\u1ecdn = (180 \u2013 90)\/2 = 45<\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"3\"><li>Tam gi\u00e1c \u0111\u1ec1u:<\/li><\/ol>\n\n\n\n<p>\u0110\u1ecbnh ngh\u0129a:<\/p>\n\n\n\n<p>T\u1eeb \u0111\u1ecbnh l\u00fd 1 v\u00e0 2 suy ra c\u00e1c h\u1ec7 qu\u1ea3 sau:<\/p>\n\n\n\n<p>Ch\u1ee9ng minh:<\/p>\n\n\n\n<p>X\u00e9t tam gi\u00e1c \u0111\u1ec1u ABC,<\/p>\n\n\n\n<p>Ta c\u00f3 AB = AC =&gt; ABC c\u00e2n t\u1ea1i A =&gt; B = C (1)<\/p>\n\n\n\n<p>L\u1ea1i c\u00f3: AC = BC =&gt; ABC c\u00e2n t\u1ea1i C =&gt; A = B (2)<\/p>\n\n\n\n<p>T\u1eeb (1) v\u00e0 (2) suy ra A = B = C (3)<\/p>\n\n\n\n<p>M\u00e0 theo \u0111\u1ecbnh l\u00fd t\u1ed5ng ba g\u00f3c trong 1 tam gi\u00e1c ta c\u00f3 A + B + C = 180<\/p>\n\n\n\n<p>T\u1eeb (3) suy ra A = B = C = 180\/3 = 60<\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"4\"><li>M\u1eb9o ghi nh\u1edb:<\/li><\/ol>\n\n\n\n<p>Tam gi\u00e1c c\u00e2n<\/p>\n\n\n\n<p>+L\u00e0 tam gi\u00e1c c\u00f3 2 c\u1ea1nh b\u1eb1ng nhau<\/p>\n\n\n\n<p>+L\u00e0 tam gi\u00e1c c\u00f3 2 g\u00f3c b\u1eb1ng nhau<\/p>\n\n\n\n<p>Tam gi\u00e1c \u0111\u1ec1u:<\/p>\n\n\n\n<p>+C\u00f3 3 c\u1ea1nh b\u1eb1ng nhau<\/p>\n\n\n\n<p>+C\u00f3 3 g\u00f3c b\u1eb1ng nhau v\u00e0 b\u1eb1ng 60<\/p>\n\n\n\n<p>+Tam gi\u00e1c \u0111\u1ec1u l\u00e0 tr\u01b0\u1eddng h\u1ee3p \u0111\u1eb7c bi\u1ec7t c\u1ee7a tam gi\u00e1c c\u00e2n. N\u1ebfu m\u1ed9t tam gi\u00e1c c\u00e2n c\u00f3 g\u00f3c \u1edf \u0111\u1ec9nh b\u1eb3ng 60 \u0111\u1ed9 th\u00ec \u0111\u00f3 l\u00e0 tam gi\u00e1c \u0111\u1ec1u<\/p>\n\n\n\n<p>Ch\u00fa \u00fd:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>C\u00e1c g\u00f3c \u1edf \u0111\u00e1y trong tam gi\u00e1c c\u00e2n kh\u00f4ng l\u1edbn h\u01a1n 60, g\u00f3c \u1edf \u0111\u1ec9nh lu\u00f4n l\u1edbn h\u01a1n 60. N\u1ebfu g\u00f3c \u1edf \u0111\u1ec9nh b\u1eb1ng 90 th\u00ec \u0111\u00f3 l\u00e0 tam gi\u00e1c vu\u00f4ng c\u00e2n.<\/li><li>Tam gi\u00e1c \u0111\u1ec1u lu\u00f4n l\u00e0 tam gi\u00e1c nh\u1ecdn, c\u00e1c g\u00f3c c\u1ee7a tam gi\u00e1c \u0111\u1ec1u lu\u00f4n b\u1eb1ng 60<\/li><\/ul>\n\n\n\n<ol class=\"wp-block-list\"><li>L\u00e0m sao \u0111\u1ec3 h\u1ecdc t\u1ed1t<\/li><\/ol>\n\n\n\n<p>N\u1eafm v\u1eefng ki\u1ebfn th\u1ee9c v\u1ec1 tam gi\u00e1c c\u00e2n. \u0110\u01b0\u1ee3c nh\u01b0 tam gi\u00e1c c\u00f3 \u1ee9ng d\u1ee5ng nhi\u1ec1u nh\u1ea5t trong h\u00ecnh h\u1ecdc. V\u00ec v\u1eady, b\u1ea1n c\u1ea7n n\u1eafm ch\u1eafc ki\u1ebfn th\u1ee9c v\u1ec1 lo\u1ea1i tam gi\u00e1c n\u00e0y<\/p>\n\n\n\n<p>L\u00e0m b\u00e0i t\u1eadp th\u01b0\u1eddng xuy\u00ean. H\u00e3y th\u01b0\u1eddng xuy\u00ean l\u00e0m b\u00e0i t\u1eadp \u0111\u1ec3 th\u00e0nh th\u1ea1o ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3i to\u00e1n, l\u00e0m quen v\u1edbi nhi\u1ec1u d\u1ea1ng \u0111\u1ec1 kh\u00e1c nhau.<\/p>\n\n\n\n<p>L\u00e0m b\u00e0i t\u1eadp to\u00e1n h\u00ecnh th\u00ec h\u00e3y v\u1ebd h\u00ecnh. Ng\u01b0\u1eddi ta n\u00f3i r\u1eb1ng n\u1ebfu l\u00e0m to\u00e1n h\u00ecnh m\u00e0 kh\u00f4ng v\u1ebd h\u00ecnh th\u00ec coi nh\u01b0 b\u1ea1n kh\u00f4ng bi\u1ebft c\u00e1ch gi\u1ea3i. Tuy \u0111\u01a1n gi\u1ea3n nh\u01b0ng \u0111\u00e2y l\u1ea1i l\u00e0 c\u00f4ng vi\u1ec7c r\u1ea5t quan tr\u1ecdng l\u00e0m c\u01a1 s\u1edf gi\u00fap b\u1ea1n suy lu\u1eadn. M\u1ed9t l\u1ea7n v\u1ebd h\u00ecnh t\u01b0\u01a1ng \u1ee9ng v\u1edbi 1 l\u1ea7n \u0111\u1ecdc v\u00e0 gi\u1ea3i b\u00e0i t\u1eadp.<\/p>\n\n\n\n<p>H\u00e3y t\u00ecm c\u00e1ch gi\u1ea3i m\u1edbi. Trong to\u00e1n h\u00ecnh lu\u00f4n c\u00f3 nhi\u1ec1u h\u01a1n 1 c\u00e1ch gi\u1ea3i. V\u00ec v\u1eady h\u00e3y c\u1ed1 g\u1eafng t\u00ecm ra c\u00e1ch gi\u1ea3i th\u1ee9 2. \u0110i\u1ec1u n\u00e0y s\u1ebd gi\u00fap b\u1ea1n n\u1eafm ch\u1eafc ki\u1ebfn th\u1ee9c h\u01a1n b\u1edfi c\u00e1ch l\u00e0n th\u1ee9 2 s\u1ebd \u0111\u00f2i h\u1ecfi b\u1ea1n ph\u1ea3i v\u1eadn d\u1ee5ng nhi\u1ec1u ki\u1ebfn th\u1ee9c h\u01a1n. Tuy c\u00f3 ch\u00fat kh\u00f3 kh\u0103n nh\u01b0ng \u0111\u00e2y ch\u00ednh l\u00e0 <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">ph\u01b0\u01a1ng ph\u00e1p h\u1ecdc<\/a> t\u1ed1t c\u1ee7a c\u00e1c ng\u00f4i sao to\u00e1n h\u1ecdc.<\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"6\"><li>B\u00e0i t\u1eadp<\/li><\/ol>\n\n\n\n<p>B\u00e0i t\u1eadp 1:<\/p>\n\n\n\n<p>X\u00e9t tam gi\u00e1c MNO, c\u00e2n t\u1ea1i M. Ho\u00e0n th\u00e0nh b\u1ea3ng sau:<\/p>\n\n\n\n<p>MN 10cm 7cm ? ? ? 8cm<\/p>\n\n\n\n<p>MO ? ? 5cm 12cm 4cm ?<\/p>\n\n\n\n<p>N ? ? 34 67 20 40<\/p>\n\n\n\n<p>O 30 45 ? ? ? ?<\/p>\n\n\n\n<p>L\u1eddi gi\u1ea3i:<\/p>\n\n\n\n<p>MN 10cm 7cm 5cm 12cm 4cm 8cm<\/p>\n\n\n\n<p>MO 10cm 7cm 5cm 12cm 4cm 8cm<\/p>\n\n\n\n<p>N 30 45 34 67 20 40<\/p>\n\n\n\n<p>O 30 45 34 67 20 40<\/p>\n\n\n\n<p>B\u00e0i t\u1eadp 2:<\/p>\n\n\n\n<p>X\u00e9t tam gi\u00e1c \u0111\u1ec1u MNO<\/p>\n\n\n\n<p>T\u00ednh chi\u1ec1u d\u00e0i NO bi\u1ebft MN = 18 cm<\/p>\n\n\n\n<p>T\u00ednh s\u1ed1 \u0111o g\u00f3c N<\/p>\n\n\n\n<p>L\u1eddi gi\u1ea3i:<\/p>\n\n\n\n<p>V\u00ec MNO l\u00e0 tam gi\u00e1c \u0111\u1ec1u n\u00ean NO = MN = MO<\/p>\n\n\n\n<p>=&gt; NO = 18 cm<\/p>\n\n\n\n<p>V\u1eady chi\u1ec1u d\u00e0i NO = 18 cm<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code> 2. V\u00ec MNO l\u00e0 tam gi\u00e1c \u0111\u1ec1u n\u00ean M = N = O = 180\/3 = 60<\/code><\/pre>\n\n\n\n<p>V\u1eady s\u1ed1 \u0111o g\u00f3c N = 60<\/p>\n\n\n\n<p>B\u00e0i t\u1eadp 3:<\/p>\n\n\n\n<p>Cho c\u00e1c nh\u1eadn \u0111\u1ecbnh sau, \u0111\u00e2u l\u00e0 nh\u1eadn \u0111\u1ecbnh \u0111\u00fang<\/p>\n\n\n\n<p>a. Tam gi\u00e1c c\u00e2n l\u00e0 tam gi\u00e1c c\u00f3 3 c\u1ea1nh b\u1eb1ng nhau<\/p>\n\n\n\n<p>b. Tam gi\u00e1c c\u00f3 3 c\u1ea1nh b\u1eb1ng nhau l\u00e0 tam gi\u00e1c c\u00e2n<\/p>\n\n\n\n<p>c. Tam gi\u00e1c \u0111\u1ec1u l\u00e0 tam gi\u00e1c c\u00e2n c\u00f3 g\u00f3c \u1edf \u0111\u1ec9nh b\u1eb3ng 60<\/p>\n\n\n\n<p>d. Chu vi tam gi\u00e1c \u0111\u1ec1u b\u1eb1ng s\u1ed1 \u0111o chi\u1ec1u d\u00e0i c\u1ee7a 1 c\u1ea1nh nh\u00e2n 3.<\/p>\n\n\n\n<p>e. \u0110a gi\u00e1c c\u00f3 3 g\u00f3c b\u1eb1ng 70 \u0111\u1ed9 l\u00e0 tam gi\u00e1c \u0111\u1ec1u<\/p>\n\n\n\n<p>L\u1eddi gi\u1ea3i:<\/p>\n\n\n\n<p>a. Sai v\u00ec tam gi\u00e1c c\u00f3 3 c\u1ea1nh b\u1eb1ng nhau l\u00e0 tam gi\u00e1c \u0111\u1ec1u<\/p>\n\n\n\n<p>b. \u0110\u00fang v\u00ec tam gi\u00e1c \u0111\u1ec1u ch\u1eafc ch\u1eafn l\u00e0 tam gi\u00e1c c\u00e2n<\/p>\n\n\n\n<p>c. \u0110\u00fang v\u00ec tam gi\u00e1c c\u00e2n c\u00f3 1 g\u00f3c b\u1eb1ng 60 l\u00e0 tam giac \u0111\u1ec1u<\/p>\n\n\n\n<p>d. \u0110\u00fang v\u00ec tam gi\u00e1c \u0111\u1ec1u c\u00f3 3 c\u1ea1nh b\u1eb1ng nhau<\/p>\n\n\n\n<p>e. Sai v\u00ec t\u1ed5ng 3 g\u00f3c trong 1 tam gi\u00e1c ph\u1ea3i b\u1eb1ng 180<\/p>\n\n\n\n<p>L\u1eddi k\u1ebft:<\/p>\n\n\n\n<p>Hy v\u1ecdng v\u1edbi nh\u1eefng n\u1ed9i dung tr\u00ean, Vietlearn \u0111\u00e3 gi\u00fap c\u00e1c b\u00e9 hi\u1ec3u v\u00e0 n\u1eafm \u0111\u01b0\u1ee3c n\u1ed9i dung ki\u1ebfn th\u1ee9c v\u1ec1 hai lo\u1ea1i tam gi\u00e1c \u0111\u1eb7c bi\u1ec7t l\u00e0 tam gi\u00e1c c\u00e2n v\u00e0 tam gi\u00e1c \u0111\u1ec1u: \u0111\u1ecbnh ngh\u0129a, t\u00ednh ch\u1ea5t c\u1ee7a c\u00e1c lo\u1ea1i tam gi\u00e1c,\u2026 \u0110\u1eebng qu\u00ean th\u01b0\u1eddng xuy\u00ean theo d\u00f5i Vietlearn \u0111\u1ec3 c\u1eadp nh\u1eadt nh\u1eefng b\u00e0i h\u1ecdc b\u1ed5 \u00edch nh\u00e9.<\/p>\n\n\n\n<p>V\u1ec1 Vietlearn<\/p>\n\n\n\n<p>H\u1ecdc tr\u1ef1c tuy\u1ebfn t\u1ea1i Vietlearn<\/p>\n\n\n\n<p>Vietlearn l\u00e0 c\u00f4ng ty Edtech v\u1ec1 gi\u00e1o d\u1ee5c tr\u1ef1c tuy\u1ebfn, cung c\u1ea5p tr\u1ea3i nghi\u1ec7m <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">h\u1ecdc t\u1eadp<\/a> c\u00e1 nh\u00e2n cho h\u00e0ng tr\u0103m ngh\u00ecn <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">h\u1ecdc sinh<\/a>, sinh vi\u00ean v\u00e0 nh\u00e0 tr\u01b0\u1eddng \u0111\u1ec3 gi\u1ea3i \u0111\u00e1p nh\u1eefng y\u00eau c\u1ea7u trong vi\u1ec7c <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">h\u1ecdc t\u1eadp<\/a> Anh ng\u1eef th\u00f4ng qua m\u1ea1ng l\u01b0\u1edbi c\u00e1c <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">chuy\u00ean gia<\/a> v\u00e0 <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">gi\u00e1o vi\u00ean<\/a> kh\u1eafp to\u00e0n c\u1ea7u m\u00e0 ch\u00fang t\u00f4i g\u1ecdi l\u00e0 c\u00e1c <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">gia s\u01b0<\/a> h\u1ecdc thu\u1eadt qu\u1ed1c t\u1ebf.<\/p>\n\n\n\n<p>Vietlearn mong mu\u1ed1n tr\u1edf th\u00e0nh h\u1ec7 th\u1ed1ng h\u1ecdc t\u1eadp th\u00edch \u1ee9ng s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 tr\u00ed tu\u1ec7 nh\u00e2n t\u1ea1o (AI) v\u00e0 d\u1eef li\u1ec7u l\u1edbn h\u00e0ng \u0111\u1ea7u \u0110\u00f4ng Nam \u00c1. S\u1ee9 m\u1ec7nh c\u1ee7a Vietlearn l\u00e0 truy\u1ec1n c\u1ea3m h\u1ee9ng, truy\u1ec1n l\u1eeda, v\u00e0 b\u1ed3i d\u01b0\u1ee1ng th\u1ebf h\u1ec7 tr\u1ebb. Vietlearn mong mu\u1ed1n t\u1ea1o ra s\u1ef1 thay \u0111\u1ed5i v\u1ec1 tr\u00ed tu\u1ec7, nh\u1eadn th\u1ee9c x\u00e3 h\u1ed9i truy\u1ec1n c\u1ea3m h\u1ee9ng , gi\u00fap c\u00e1c em ph\u00e1t huy h\u1ebft ti\u1ec1m n\u0103ng trong vi\u1ec7c h\u1ecdc c\u0169ng nh\u01b0 \u0111i\u1ec3m m\u1ea1nh c\u1ee7a m\u00ecnh.<\/p>\n\n\n\n<p>\u0110\u0103ng k\u00fd kh\u00f3a h\u1ecdc t\u1ea1i Vietlearn cho con ngay h\u00f4m nay!<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>\u0110\u1ecbnh l\u00fd Pytago v\u00e0 nh\u1eefng ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n \u2013 To\u00e1n l\u1edbp 7 l\u00e0 chuy\u1ec7n nh\u1ecf<\/p>\n\n\n\n<p>Hai<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"<p>Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn Th\u1ebf n\u00e0o \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 tam gi\u00e1c c\u00e2n? Tam gi\u00e1c \u0111\u1ec1u l\u00e0 g\u00ec? \u0110\u1eb7c \u0111i\u1ec3m v\u00e0 t\u00ednh ch\u1ea5t c\u1ee7a tam gi\u00e1c \u0111\u1ec1u? \u0110\u00e2y \u0111\u1ec1u l\u00e0 nh\u1eefng lo\u1ea1i tam gi\u00e1c \u0111\u1eb7c bi\u1ec7t, \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng nhi\u1ec1u trong h\u00ecnh h\u1ecdc t\u1eeb b\u1eadc THCS t\u1edbi THPT v\u00e0 c\u1ea3 nh\u1eefng c\u1ea5p h\u1ecdc cao [&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-2541","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\/2541","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=2541"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/2541\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=2541"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=2541"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=2541"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}