Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn<\/p>\n\n\n\n
Hai tam gi\u00e1c b\u1eb1ng nhau l\u00e0 g\u00ec? C\u1ea1nh v\u00e0 g\u00f3c trong hai tam gi\u00e1c b\u1eb1ng nhau c\u00f3 m\u1ed1i li\u00ean h\u1ec7 g\u00ec? Trong b\u00e0i h\u1ecdc n\u00e0y ch\u00fang ta s\u1ebd c\u00f9ng c\u00e1c b\u00e9 t\u00ecm hi\u1ec3u v\u1ec1 c\u00e1c n\u1ed9i dung tr\u00ean. Theo d\u00f5i b\u00e0i vi\u1ebft ngay d\u01b0\u1edbi \u0111\u00e2y.<\/p>\n\n\n\n
Hai tam gi\u00e1c b\u1eb1ng nhau<\/p>\n\n\n\n
V\u00ed d\u1ee5:<\/p>\n\n\n\n
B\u01b0\u1edbc 1: V\u1ebd 1 h\u00ecnh ch\u1eef nh\u1eadt ABCD<\/p>\n\n\n\n
B\u01b0\u1edbc 2: V\u1ebd \u0111\u01b0\u1eddng ch\u00e9o AC<\/p>\n\n\n\n
B\u01b0\u1edbc 3: S\u1eed d\u1ee5ng th\u01b0\u1edbc k\u1ebb v\u00e0 th\u01b0\u1edbc \u0111o \u0111\u1ed9 \u0111\u1ec3 \u0111o chi\u1ec1u d\u00e0i v\u00e0 s\u1ed1 \u0111o c\u00e1c c\u1eb7p c\u1ea1nh v\u00e0 c\u00e1c c\u1eb7p g\u00f3c sau:<\/p>\n\n\n\n
C\u1ea1nh AB v\u00e0 CD, AD v\u00e0 BC<\/p>\n\n\n\n
G\u00f3c ABC v\u00e0 ADC, BAC v\u00e0 ACD, ACB v\u00e0 CAD<\/p>\n\n\n\n
Ta th\u1ea5y<\/p>\n\n\n\n
AB = CD, AD = BC, AC l\u00e0 c\u1ea1nh chung<\/p>\n\n\n\n
ABC = ADC, BAC = ACD, ACB = CAD<\/p>\n\n\n\n
C\u00e1c c\u1ea1nh AB v\u00e0 CD, AD v\u00e0 BC, AC l\u00e0 c\u00e1c c\u1ea1nh t\u01b0\u01a1ng \u1ee9ng<\/p>\n\n\n\n
C\u00e1c g\u00f3c ABC v\u00e0 ADC, BAC v\u00e0 ACD, ACB v\u00e0 CAD l\u00e0 c\u00e1c g\u00f3c t\u01b0\u01a1ng \u1ee9ng<\/p>\n\n\n\n
\u0110\u1ecbnh ngh\u0129a hai tam gi\u00e1c b\u1eb1ng nhau<\/p>\n\n\n\n
Hai tam gi\u00e1c b\u1eb1ng nhau \u0111\u01b0\u1ee3c \u00fd hi\u1ec7u l\u00e0: \u0394ABC = \u0394CDA<\/p>\n\n\n\n
Trong \u0111\u00f3, c\u00e1c ch\u1eef c\u00e1i ch\u1ec9 t\u00ean \u0111\u1ec9nh t\u01b0\u01a1ng \u1ee9ng \u0111\u01b0\u1ee3c \u0111\u1eb7t theo th\u1ee9 t\u1ef1 nh\u01b0 nhau<\/p>\n\n\n\n
Theo \u0111\u00f3, ta suy ra k\u1ebft lu\u1eadn sau:<\/p>\n\n\n\n
\u0394ABC = \u0394CDA khi v\u00e0 ch\u1ec9 khi AB = CD, AD = BC, AC = CA<\/p>\n\n\n\n
ABC = ADC, BAC = ACD, ACB = CAD<\/code><\/pre>\n\n\n\n- M\u1eb9o ghi nh\u1edb:<\/li><\/ol>\n\n\n\n
Hai tam gi\u00e1c b\u1eb1ng nhau:<\/p>\n\n\n\n
+C\u00f3 t\u1ea5t c\u1ea3 c\u00e1c c\u1ea1nh b\u1eb1ng nhau<\/p>\n\n\n\n
+T\u1ea5t c\u1ea3 c\u00e1c g\u00f3c b\u1eb1ng nhau<\/p>\n\n\n\n
L\u00e0m sao \u0111\u1ec3 h\u1ecdc t\u1ed1t?<\/p>\n\n\n\n
H\u00e3y t\u1eadp trung cho ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n<\/a>, n\u1ed9i dung b\u00e0i h\u1ecdc hai tam gi\u00e1c b\u1eb1ng nhau c\u00f3 \u1ee9ng d\u1ee5ng r\u1ea5t r\u1ed9ng trong ch\u01b0\u01a1ng tr\u00ecnh to\u00e1n<\/a> h\u1ecdc l\u1edbp 7. Do \u0111\u00f3, c\u00e1c b\u00e9 c\u1ea7n \u0111\u1ea3m b\u1ea3o n\u1eafm ch\u1eafc n\u1ed9i dung ki\u1ebfn th\u1ee9c c\u1ee7a b\u00e0i h\u1ecdc n\u00e0y. B\u00ean c\u1ea1nh \u0111\u00f3 l\u00e0 th\u01b0\u1eddng xuy\u00ean luy\u1ec7n t\u1eadp b\u1eb1ng vi\u1ec7c gi\u1ea3i b\u00e0i t\u1eadp.<\/p>\n\n\n\n- Hai tam gi\u00e1c 3 g\u00f3c b\u1eb1ng nhau li\u1ec7u c\u00f3 b\u1eb1ng nhau hay kh\u00f4ng?<\/li><\/ol>\n\n\n\n
Ta \u0111\u01b0\u1ee3c t\u00ecm hi\u1ec3u r\u1eb1ng hai tam gi\u00e1c b\u1eb1ng nhau th\u00ec t\u1ea5t c\u1ea3 c\u00e1c c\u1ea1nh v\u00e0 t\u1ea5t c\u1ea3 c\u00e1c g\u00f3c \u0111\u1ec1u b\u1eb1ng nhau. Tuy nhi\u00ean n\u1ebfu ch\u1ec9 c\u00f3 duy nh\u1ea5t gi\u1ea3 thi\u1ebft r\u1eb1ng 3 g\u00f3c c\u1ee7a 2 tam gi\u00e1c \u0111\u00f3 b\u1eb1ng nhau th\u00ec li\u1ec7u r\u1eb1ng 2 tam gi\u00e1c \u0111\u00f3 c\u00f3 b\u1eb1ng nhau hay kh\u00f4ng? C\u00e2u h\u1ecfi n\u00e0y \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u1eb7t ra b\u1edfi c\u00e1c nh\u00e0 to\u00e1n h\u1ecdc t\u1eeb th\u1eddi c\u1ed5 \u0111\u1ea1i. C\u00e2u tr\u1ea3 l\u1eddi l\u00e0 kh\u00f4ng ph\u1ea3i t\u1ea5t c\u1ea3 c\u00e1c tam gi\u00e1c n\u00e0y b\u1eb1ng nhau.<\/p>\n\n\n\n
C\u00f3 c\u00f9ng s\u1ed1 \u0111o g\u00f3c t\u01b0\u01a1ng \u1ee9ng nh\u01b0ng li\u1ec7u c\u00f3 b\u1eb1ng nhau?<\/p>\n\n\n\n
Th\u1eadt v\u1eady, hai tam gi\u00e1c b\u1eb1ng nhau th\u00ec c\u00f3 c\u00e1c g\u00f3c b\u1eb1ng nhau nh\u01b0ng hai tam gi\u00e1c c\u00f3 c\u00e1c g\u00f3c b\u1eb1ng nhau th\u00ec ch\u01b0a ch\u1eafc \u0111\u00e3 b\u1eb1ng nhau. \u0110i\u1ec1u n\u00e0y \u0111\u00e3 n\u1ea3y sinh ra m\u1ed9t kh\u00e1i ni\u1ec7m m\u1edbi \u0111\u00f3 l\u00e0 2 tam gi\u00e1c \u0111\u1ed3ng d\u1ea1ng. \u0110\u00f3 l\u00e0 nh\u1eefng tam gi\u00e1c c\u00f3 c\u00e1c g\u00f3c b\u1eb1ng nhau nh\u01b0ng c\u00e1c c\u1ea1nh c\u00f3 th\u1ec3 b\u1eb1ng nhau ho\u1eb7c kh\u00f4ng. Hi\u1ec3u m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n tam gi\u00e1c \u0111\u1ed3ng d\u1ea1ng l\u00e0 nh\u1eefng phi\u00ean b\u1ea3n ph\u00f3ng to k\u00edch th\u01b0\u1edbc c\u1ee7a tam gi\u00e1c nh\u1ecf h\u01a1n.<\/p>\n\n\n\n
V\u00ed d\u1ee5: Tam gi\u00e1c vu\u00f4ng c\u00f3 c\u1ea1nh 3-4-5 c\u00f3 s\u1ed1 \u0111o g\u00f3c b\u1eb1ng s\u1ed1 \u0111o g\u00f3c c\u1ee7a tam gi\u00e1c c\u00f3 c\u1ea1nh 6-8-10<\/p>\n\n\n\n
- B\u00e0i t\u1eadp v\u1eadn d\u1ee5ng<\/li><\/ol>\n\n\n\n
B\u00e0i t\u1eadp 1<\/p>\n\n\n\n
Cho 2 tam gi\u00e1c b\u1eb1ng nhau ABC v\u00e0 MNO<\/p>\n\n\n\n
Ch\u1ec9 ra c\u00e1c c\u1eb7p g\u00f3c b\u1eb1ng nhau<\/p>\n\n\n\n
Ch\u1ec9 ra c\u00e1c c\u1eb7p c\u1ea1nh b\u1eb1ng nhau<\/p>\n\n\n\n
L\u1eddi gi\u1ea3i:<\/p>\n\n\n\n
V\u00ec tam gi\u00e1c ABC v\u00e0 tam gi\u00e1c MNO b\u1eb1ng nhau, do \u0111\u00f3, ta c\u00f3 c\u00e1c c\u1eb7p g\u00f3c t\u01b0\u01a1ng \u1ee9ng<\/p>\n\n\n\n
C\u00e1c g\u00f3c b\u1eb1ng nhau l\u00e0:<\/p>\n\n\n\n
A = M<\/p>\n\n\n\n
B = N<\/p>\n\n\n\n
C = O<\/p>\n\n\n\n
2. V\u00ec tam gi\u00e1c ABC v\u00e0 tam gi\u00e1c MNO b\u1eb1ng nhau, do \u0111\u00f3, ta c\u00f3 c\u00e1c c\u1eb7p c\u1ea1nh t\u01b0\u01a1ng \u1ee9ng<\/code><\/pre>\n\n\n\nC\u00e1c c\u1ea1nh b\u1eb1ng nhau l\u00e0:<\/p>\n\n\n\n
AB = MN<\/p>\n\n\n\n
BC = NO<\/p>\n\n\n\n
AC = MO<\/p>\n\n\n\n
B\u00e0i t\u1eadp 2:<\/p>\n\n\n\n
X\u00e9t 2 tam gi\u00e1c b\u1eb1ng nhau l\u00e0 ABC v\u00e0 MNO.<\/p>\n\n\n\n
Bi\u1ebft c\u00e1c th\u00f4ng tin sau: A = 90\u2070, MN = 7cm, AC = 5cm, O = 30\u2070<\/p>\n\n\n\n
X\u00e1c \u0111\u1ecbnh t\u1ea5t c\u1ea3 s\u1ed1 \u0111o c\u00e1c g\u00f3c v\u00e0 chi\u1ec1u d\u00e0i c\u00e1c c\u1ea1nh c\u1ee7a 2 tam gi\u00e1c tr\u00ean:<\/p>\n\n\n\n
L\u1eddi gi\u1ea3i:<\/p>\n\n\n\n
Ta c\u00f3<\/p>\n\n\n\n
A = 90\u2070 => M = 90\u2070<\/p>\n\n\n\n
O = 30\u2070 => C = 30\u2070<\/p>\n\n\n\n
B = N = 90\u2070 \u2013 A \u2013 C = 180\u2070 \u2013 90\u2070 \u2013 30\u2070 = 60\u2070<\/p>\n\n\n\n
MN = 7cm => AB = 7cm<\/p>\n\n\n\n
AC = 5cm => MO = 5cm<\/p>\n\n\n\n
B\u00e0i t\u1eadp 3:<\/p>\n\n\n\n
Cho tam gi\u00e1c b\u1eb1ng nhau ABC v\u00e0 MNO.<\/p>\n\n\n\n
Bi\u1ebft AB = 15cm, BC = 10cm, AC = 9cm<\/p>\n\n\n\n
T\u00ednh chu vi tam gi\u00e1c ABC, MNO v\u00e0 t\u1ed5ng chu vi c\u1ee7a 2 tam gi\u00e1c tr\u00ean<\/p>\n\n\n\n
L\u1eddi gi\u1ea3i:<\/p>\n\n\n\n
Ta c\u00f3 chu vi tam giac ABC = AB + AC + BC = 15 + 9 + 10 = 34 cm<\/p>\n\n\n\n
L\u1ea1i c\u00f3, ABC v\u00e0 MNO l\u00e0 2 tam gi\u00e1c b\u1eb1ng nhau<\/p>\n\n\n\n
=> MN = AB, MO = AC, NO = BC<\/p>\n\n\n\n
=> Chu vi tam gi\u00e1c MNO = MN + MO + NO = 15 + 9 + 10 = 34 cm<\/p>\n\n\n\n
T\u1ed5ng chu vi c\u1ee7a ABC v\u00e0 MNO l\u00e0: 34 + 34 = 68 cm<\/p>\n\n\n\n
B\u00e0i t\u1eadp 4:<\/p>\n\n\n\n
Cho hai tam gi\u00e1c c\u00f3 \u0111\u1eb7c \u0111i\u1ec3m nh\u01b0 sau:<\/p>\n\n\n\n
a. 2 tam gi\u00e1c c\u00f3 c\u00e1c c\u1ea1nh b\u1eb1ng nhau<\/p>\n\n\n\n
b. 2 tam gi\u00e1c vu\u00f4ng<\/p>\n\n\n\n
c. 2 tam gi\u00e1c c\u00e2n<\/p>\n\n\n\n
d. 2 tam gi\u00e1c \u0111\u1ec1u<\/p>\n\n\n\n
e. 2 tam gi\u00e1c t\u00f9<\/p>\n\n\n\n
f. 2 tam gi\u00e1c c\u00f3 chu vi b\u1eb1ng nhau<\/p>\n\n\n\n
g. 2 tam gi\u00e1c c\u00f3 c\u00e1c g\u00f3c b\u1eb1ng nhau<\/p>\n\n\n\n
h. 2 tam giac c\u00f3 di\u1ec7n t\u00edch b\u1eb1ng nhau.<\/p>\n\n\n\n
Trong c\u00e1c tr\u01b0\u1eddng h\u1ee3p tr\u00ean, tr\u01b0\u1eddng h\u1ee3p n\u00e0o l\u00e0 hai tam gi\u00e1c b\u1eb1ng nhau, ch\u1ec9 ra l\u00fd do<\/p>\n\n\n\n
L\u1eddi gi\u1ea3i:<\/p>\n\n\n\n
Ta c\u00f3:<\/p>\n\n\n\n
a. Tam gi\u00e1c c\u00f3 c\u1ea1nh b\u1eb1ng nhau th\u00ec l\u00e0 tam gi\u00e1c vu\u00f4ng => \u0110\u00fang<\/p>\n\n\n\n
b. Tam gi\u00e1c vu\u00f4ng ch\u1ec9 c\u00f3 chung 1 g\u00f3c vu\u00f4ng b\u1eb1ng 90, ch\u01b0a \u0111\u1ee7 c\u01a1 s\u1edf k\u1ebft lu\u1eadn => Sai<\/p>\n\n\n\n
c. Tam gi\u00e1c c\u00e2n c\u00f3 2 c\u1ea1nh b\u1eb1ng nhau nh\u01b0ng ch\u01b0a \u0111\u1ee7 c\u01a1 s\u1edf k\u1ebft lu\u1eadn => Sai<\/p>\n\n\n\n
d. Tam gi\u00e1c \u0111\u1ec1u c\u00f3 c\u00e1c c\u1ea1nh b\u1eb1ng nhau nh\u01b0ng ch\u01b0a \u0111\u1ee7 c\u01a1 s\u1edf k\u1ebft lu\u1eadn => Sai<\/p>\n\n\n\n
e. Tam gi\u00e1c t\u00f9 \u00edt c\u00f3 kh\u1ea3 n\u0103ng b\u1eb1ng nhau => Sai<\/p>\n\n\n\n
f. Tam gi\u00e1c c\u00f3 chu vi b\u1eb1ng nhau c\u00f3 ngh\u00e3i l\u00e0 t\u1ed5ng s\u1ed1 \u0111o c\u00e1c c\u1ea1nh b\u1eb1ng nhau, ch\u01b0a \u0111\u1ee7 ch\u1ee9ng minh m\u1ed7i c\u1eb7p c\u1ea1nh l\u00e0 b\u1eb1ng nhau => Sai<\/p>\n\n\n\n
g. Tam gi\u00e1c c\u00f3 c\u00e1c g\u00f3c b\u1eb1ng nhau nh\u01b0ng c\u00e1c c\u1ea1nh c\u00f3 th\u1ec3 kh\u00f4ng b\u1eb1ng nhau => Sai<\/p>\n\n\n\n
h. Tam gi\u00e1c c\u00f3 di\u1ec7n t\u00edch b\u1eb1ng nhau nh\u01b0ng kh\u00f4ng th\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1c c\u1ea1nh b\u1eb1ng nhau => Sai<\/p>\n\n\n\n
L\u1eddi k\u1ebft: V\u1edbi n\u1ed9i dung b\u00e0i h\u1ecdc v\u1ec1 hai tam gi\u00e1c b\u1eb1ng nhau, hy v\u1ecdng, qua b\u00e0i vi\u1ebft tr\u00ean, Vietlearn \u0111\u00e3 gi\u00fap c\u00e1c b\u00e9 t\u1ef1 tin h\u01a1n, n\u1eafm \u0111\u01b0\u1ee3c ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n<\/a>. C\u00e1c b\u00e9 h\u00e3y \u00f4n t\u1eadp l\u00fd thuy\u1ebft v\u00e0 l\u00e0m b\u00e0i t\u1eadp \u0111\u1ec1u \u0111\u1eb7n \u0111\u1ec3 c\u1ee7ng c\u1ed1 ki\u1ebfn th\u1ee9c.Theo d\u00f5i Vietlearn th\u01b0\u1eddng xuy\u00ean \u0111\u1ec3 c\u1eadp nh\u1eadt nh\u1eefng b\u00e0i h\u1ecdc m\u1edbi nh\u1ea5t.<\/p>\n\n\n\nV\u1ec1 Vietlearn<\/p>\n\n\n\n
H\u1ecdc tr\u1ef1c tuy\u1ebfn t\u1ea1i Vietlearn<\/p>\n\n\n\n
Vietlearn l\u00e0 c\u00f4ng ty Edtech v\u1ec1 gi\u00e1o d\u1ee5c tr\u1ef1c tuy\u1ebfn, cung c\u1ea5p tr\u1ea3i nghi\u1ec7m h\u1ecdc t\u1eadp<\/a> c\u00e1 nh\u00e2n cho h\u00e0ng tr\u0103m ngh\u00ecn h\u1ecdc sinh, 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 h\u1ecdc t\u1eadp<\/a> Anh ng\u1eef th\u00f4ng qua m\u1ea1ng l\u01b0\u1edbi c\u00e1c chuy\u00ean gia<\/a> v\u00e0 gi\u00e1o vi\u00ean<\/a> kh\u1eafp to\u00e0n c\u1ea7u m\u00e0 ch\u00fang t\u00f4i g\u1ecdi l\u00e0 c\u00e1c gia s\u01b0 h\u1ecdc thu\u1eadt qu\u1ed1c t\u1ebf.<\/p>\n\n\n\nVietlearn 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
\u0110\u0103ng k\u00fd kh\u00f3a h\u1ecdc cho con ngay h\u00f4m nay!<\/p>\n\n\n\n
<\/p>\n\n\n\n
\u0110\u1ea1i l\u01b0\u1ee3ng t\u1ec9 l\u1ec7 ngh\u1ecbch \u2013 To\u00e1n l\u1edbp 7 l\u00e0 chuy\u1ec7n nh\u1ecf<\/p>\n\n\n\n
M\u1eb7t ph\u1eb3ng t\u1ecda \u0111\u1ed9 \u2013 To\u00e1n l\u1edbp 7 l\u00e0 chuy\u1ec7n nh\u1ecf<\/p>\n\n\n\n
V\u1ec1 Vietlearn<\/p>\n\n\n\n
H\u1ecdc tr\u1ef1c tuy\u1ebfn t\u1ea1i Vietlearn<\/p>\n\n\n\n
Vietlearn l\u00e0 c\u00f4ng ty Edtech v\u1ec1 gi\u00e1o d\u1ee5c tr\u1ef1c tuy\u1ebfn, cung c\u1ea5p tr\u1ea3i nghi\u1ec7m h\u1ecdc t\u1eadp c\u00e1 nh\u00e2n cho h\u00e0ng tr\u0103m ngh\u00ecn h\u1ecdc sinh, 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 h\u1ecdc t\u1eadp Anh ng\u1eef th\u00f4ng qua m\u1ea1ng l\u01b0\u1edbi c\u00e1c chuy\u00ean gia v\u00e0 gi\u00e1o vi\u00ean kh\u1eafp to\u00e0n c\u1ea7u m\u00e0 ch\u00fang t\u00f4i g\u1ecdi l\u00e0 c\u00e1c gia s\u01b0 h\u1ecdc thu\u1eadt qu\u1ed1c t\u1ebf.<\/p>\n\n\n\n
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
\u0110\u0103ng k\u00fd kh\u00f3a h\u1ecdc cho con ngay h\u00f4m nay!<\/p>\n\n\n\n
<\/p>\n\n\n\n
\u0110\u1ea1i l\u01b0\u1ee3ng t\u1ec9 l\u1ec7 ngh\u1ecbch \u2013 To\u00e1n l\u1edbp<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn Hai tam gi\u00e1c b\u1eb1ng nhau l\u00e0 g\u00ec? C\u1ea1nh v\u00e0 g\u00f3c trong hai tam gi\u00e1c b\u1eb1ng nhau c\u00f3 m\u1ed1i li\u00ean h\u1ec7 g\u00ec? Trong b\u00e0i h\u1ecdc n\u00e0y ch\u00fang ta s\u1ebd c\u00f9ng c\u00e1c b\u00e9 t\u00ecm hi\u1ec3u v\u1ec1 c\u00e1c n\u1ed9i dung tr\u00ean. Theo d\u00f5i b\u00e0i vi\u1ebft ngay d\u01b0\u1edbi \u0111\u00e2y. Hai tam gi\u00e1c b\u1eb1ng […]<\/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-2551","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\/2551","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=2551"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/2551\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=2551"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=2551"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=2551"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}