Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn<\/p>\n\n\n\n
Vu\u00f4ng g\u00f3c v\u00e0 song song c\u00f3 m\u1ed1i quan h\u1ec7 nh\u01b0 th\u1ebf n\u00e0o v\u1edbi nhau? T\u1eeb t\u00ednh vu\u00f4ng g\u00f3c \u0111\u1ebfn song song c\u00f3 th\u1ec3 suy lu\u1eadn ra m\u1ed1i quan h\u1ec7 g\u00ec gi\u1eefa c\u00e1c \u0111\u01b0\u1eddng th\u1eb3ng? H\u00e3y c\u00f9ng Vietlearn t\u00ecm hi\u1ec3u qua n\u1ed9i dung b\u00e0i vi\u1ebft ngay sau \u0111\u00e2y.<\/p>\n\n\n\n
T\u1eeb vu\u00f4ng g\u00f3c \u0111\u1ebfn song song<\/p>\n\n\n\n
V\u00ed d\u1ee5:<\/p>\n\n\n\n
Cho 3 \u0111\u01b0\u1eddng th\u1eb3ng a, b v\u00e0 c. Trong \u0111\u00f3, \u0111\u01b0\u1eddng th\u1eb3ng a vu\u00f4ng g\u00f3c v\u1edbi \u0111\u01b0\u1eddng th\u1eb3ng c, \u0111\u01b0\u1eddng th\u1eb3ng b vu\u00f4ng g\u00f3c v\u1edbi \u0111\u01b0\u1eddng th\u1eb3ng c.<\/p>\n\n\n\n
Ta c\u00f3:<\/p>\n\n\n\n
Do a vu\u00f4ng g\u00f3c v\u1edbi c n\u00ean c\u00e1c g\u00f3c t\u1ea1o th\u00e0nh \u0111\u1ec1u l\u00e0 g\u00f3c vu\u00f4ng<\/p>\n\n\n\n
b vu\u00f4ng g\u00f3c v\u1edbi c n\u00ean c\u00e1c g\u00f3c t\u1ea1o th\u00e0nh c\u0169ng l\u00e0 c\u00e1c g\u00f3c vu\u00f4ng.<\/p>\n\n\n\n
X\u00e9t d\u1ea5u hi\u1ec7u nh\u1eadn bi\u1ebft hai \u0111\u01b0\u1eddng th\u1eb3ng song song ta th\u1ea5y a1 v\u00e0 a2 song song v\u1edbi nhau do c\u00f3 g\u00f3c \u0111\u1ed3ng v\u1ecb b\u1eb1ng nhau v\u00e0 b\u1eb1ng 90\u2070<\/p>\n\n\n\n
K\u1ebft lu\u1eadn:<\/p>\n\n\n\n
Cho \u0111\u01b0\u1eddng th\u1eb3ng 3 \u0111\u01b0\u1eddng th\u1eb3ng d, d\u2019, d\u201d. \u0110\u01b0\u1eddng th\u1eb3ng d song song v\u1edbi d\u2019, \u0111\u01b0\u1eddng th\u1eb3ng d\u2019 song song v\u1edbi \u0111\u01b0\u1eddng th\u1eb3ng d\u201d<\/p>\n\n\n\n
\u0110\u01b0\u1eddng th\u1eb3ng a vu\u00f4ng g\u00f3c v\u1edbi d<\/p>\n\n\n\n
Ta c\u00f3 nh\u1eadn x\u00e9t:<\/p>\n\n\n\n
D\u1ef1a v\u00e0o t\u00ednh ch\u1ea5t b\u1eafc c\u1ea7u, d song song v\u1edbi d\u2019, d\u2019 song song v\u1edbi d\u201d n\u00ean suy ra, d song song v\u1edbi d\u2019 v\u00e0 d\u201d. d, d\u2019. d\u201d l\u00e0 3 \u0111\u01b0\u1eddng th\u1eb3ng song song.<\/p>\n\n\n\n
\u0110\u01b0\u1eddng th\u1eb3ng a vu\u00f4ng g\u00f3c v\u1edbi d, m\u00e0 d song song v\u1edbi d\u2019 v\u00e0 d\u201d n\u00ean \u0111\u01b0\u1eddng th\u1eb3ng a c\u0169ng vu\u00f4ng g\u00f3c v\u1edbi 2 \u0111\u01b0\u1eddng th\u1eb3ng d\u2019 v\u00e0 d\u201d.<\/p>\n\n\n\n
Ta c\u00f3 k\u1ebft lu\u1eadn<\/p>\n\n\n\n
N\u1ebfu 2 \u0111\u01b0\u1eddng th\u1eb3ng c\u00f9ng vu\u00f4ng g\u00f3c v\u1edbi 1 \u0111\u01b0\u1eddng th\u1eb3ng th\u00ec ch\u00fang song song v\u1edbi nhau<\/p>\n\n\n\n
Ng\u01b0\u1ee3c l\u1ea1i, n\u1ebfu 1 \u0111\u01b0\u1eddng th\u1eb3ng vu\u00f4ng g\u00f3c v\u1edbi 1 trong 2 \u0111\u01b0\u1eddng th\u1eb3ng song song th\u00ec n\u00f3 c\u0169ng vu\u00f4ng g\u00f3c v\u1edbi \u0111\u01b0\u1eddng th\u1eb3ng c\u00f2n l\u1ea1i.<\/p>\n\n\n\n
N\u1ebfu 2 \u0111\u01b0\u1eddng th\u1eb3ng c\u00f9ng song song v\u1edbi 1 \u0111\u01b0\u1eddng th\u1eb3ng kh\u00e1c th\u00ec 2 \u0111\u01b0\u1eddng th\u1eb3ng \u0111\u00f3 song song v\u1edbi nhau.<\/p>\n\n\n\n
Ch\u1ec9 h\u1ecdc khi b\u1ea1n th\u1ef1c s\u1ef1 t\u1eadp trung. Thay v\u00ec d\u00e0nh r\u1ea5t nhi\u1ec1u th\u1eddi gian cho vi\u1ec7c h\u1ecdc nh\u01b0ng b\u1ea1n l\u1ea1i kh\u00f4ng th\u1ec3 duy tr\u00ec kh\u1ea3 n\u0103ng t\u1eadp trung th\u00ec t\u1ed1t h\u01a1n h\u1ebft b\u1ea1n n\u00ean d\u00f9ng vi\u1ec7c h\u1ecdc. H\u00e3y \u0111\u1ec3 b\u1ed9 n\u00e3o c\u1ee7a b\u1ea1n \u0111\u01b0\u1ee3c ngh\u1ec9 ng\u01a1i. B\u1ea1n c\u00f3 th\u1ec3 nghe nh\u1ea1c, xem phim, ch\u01a1i th\u1ec3 thao. Vi\u1ec7c c\u1ed1 g\u1eafng h\u1ecdc b\u00e0i trong khi c\u01a1 th\u1ec3 kh\u00f4ng s\u00e3n s\u00e0ng ch\u1ec9 khi\u1ebfn vi\u1ec7c h\u1ecdc tr\u1edf n\u00ean nh\u00e0m ch\u00e1n m\u00e0 kh\u00f4ng mang l\u1ea1i hi\u1ec7u qu\u1ea3 thi\u1ebft th\u1ef1c. Nh\u1ea5t l\u00e0 v\u1edbi to\u00e1n h\u00ecnh c\u1ea7n s\u1ef1 t\u01b0 duy logic v\u00e0 kh\u1ea3 n\u0103ng t\u01b0\u1edfng t\u01b0\u1ee3ng.<\/p>\n\n\n\n
L\u1eadp k\u1ebf ho\u1ea1ch c\u1ee5 th\u1ec3. H\u00e3y l\u1eadp k\u1ebf ho\u1ea1ch h\u1ecdc t\u1eadp<\/a> cho b\u1ea3n th\u00e2n. \u0110i\u1ec1u n\u00e0y s\u1ebd gi\u00fap b\u1ea1n ph\u00e2n b\u1ed5 th\u1eddi gian h\u1ecdc m\u1ed9t c\u00e1ch khoa h\u1ecdc v\u00e0 h\u1ee3p l\u00fd. Kh\u00f4ng b\u1ecb sa \u0111\u00e0, ti\u00eau t\u1ed1n qu\u00e1 nhi\u1ec1u th\u1eddi gian cho m\u1ed9t n\u1ed9i dung. B\u1ea1n c\u00f3 th\u1ec3 ch\u1ee7 \u0111\u1ed9ng ph\u00e2n ph\u1ed1i th\u1eddi l\u01b0\u1ee3ng v\u00e0 th\u1eddi \u0111i\u1ec3m h\u1ecdc t\u1eadp<\/a> sao cho tho\u1ea3i m\u00e1i v\u1edbi l\u1ecbch sinh ho\u1ea1t c\u00e1 nh\u00e2n c\u1ee7a m\u00ecnh nh\u1ea5t. B\u1ea1n c\u0169ng c\u00f3 th\u1ec3 tham kh\u1ea3o b\u1ed1 m\u1eb9 \u0111\u1ec3 x\u00e2y d\u1ef1ng k\u1ebf ho\u1ea1ch khoa h\u1ecdc v\u00e0 h\u1ee3p l\u00fd h\u01a1n.<\/p>\n\n\n\n Ki\u1ebfn th\u1ee9c tr\u00ean l\u1edbp r\u1ea5t quan tr\u1ecdng. H\u00e3y \u0111\u1ea3m b\u1ea3o r\u1eb1ng b\u1ea1n n\u1eafm ch\u1eafc ki\u1ebfn th\u1ee9c tr\u00ean l\u1edbp tr\u01b0\u1edbc khi th\u1eed s\u1ee9c v\u1edbi c\u00e1c d\u1ea1ng b\u00e0i t\u1eadp v\u00e0 ki\u1ebfn th\u1ee9c n\u00e2ng cao. Ki\u1ebfn th\u1ee9c trong s\u00e1ch gi\u00e1o khoa gi\u00fap b\u1ea1n x\u00e2y d\u1ef1ng kh\u1ed1i ki\u1ebfn th\u1ee9c n\u1ec1n t\u1ea3ng quan tr\u1ecdng. V\u00ec v\u1eady, \u0111\u1eebng c\u1ed1 g\u1eafng l\u00e0m th\u1eadt nhi\u1ec1u b\u00e0i t\u1eadp n\u00e2ng cao trong khi b\u1ea1n v\u1eabn ch\u01b0a n\u1eafm ch\u1eafc ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n<\/a>.<\/p>\n\n\n\n B\u00e0i t\u1eadp 1:<\/p>\n\n\n\n Ch\u1ec9 ra m\u1ed1i quan h\u1ec7 c\u1ee7a c\u00e1c \u0111\u01b0\u1eddng th\u1eb3ng x v\u00e0 z trong c\u00e1c tr\u01b0\u1eddng h\u1ee3p sau:<\/p>\n\n\n\n x song song v\u1edbi y, y vu\u00f4ng g\u00f3c v\u1edbi z<\/p>\n\n\n\n x song song v\u1edbi y, y song song v\u1edbi z<\/p>\n\n\n\n x vu\u00f4ng g\u00f3c v\u1edbi y, z vu\u00f4ng g\u00f3c v\u1edbi y<\/p>\n\n\n\n L\u1eddi gi\u1ea3i:<\/p>\n\n\n\n x vu\u00f4ng g\u00f3c v\u1edbi z<\/p>\n\n\n\n x song song v\u1edbi z<\/p>\n\n\n\n x song song v\u1edbi z<\/p>\n\n\n\n B\u00e0i t\u1eadp 2:<\/p>\n\n\n\n Ph\u00e1t bi\u1ec3u n\u00e0o sau \u0111\u00e2y \u0111\u00fang, ph\u00e1t bi\u1ec3u n\u00e0o sai? L\u00fd gi\u1ea3i.<\/p>\n\n\n\n a. Ba \u0111\u01b0\u1eddng th\u1eb3ng n\u1ebfu c\u00f9ng vu\u00f4ng g\u00f3c v\u1edbi 1 \u0111\u01b0\u1eddng th\u1eb3ng ph\u00e2n bi\u1ec7t th\u00ec ch\u00fang song song v\u1edbi nhau<\/p>\n\n\n\n b. N\u1ebfu 1 \u0111\u01b0\u1eddng th\u1eb3ng vu\u00f4ng g\u00f3c v\u1edbi 1 trong 2 \u0111\u01b0\u1eddng th\u1eb3ng ph\u00e2n bi\u1ec7t th\u00ec n\u00f3 c\u0169ng vu\u00f4ng g\u00f3c v\u1edbi \u0111\u01b0\u1eddng th\u1eb3ng kia<\/p>\n\n\n\n c. N\u1ebfu 2 \u0111\u01b0\u1eddng th\u1eb3ng c\u00f9ng song song v\u1edbi 1 \u0111\u01b0\u1eddng th\u1eb3ng kh\u00e1c th\u00ec 2 \u0111\u01b0\u1eddng th\u1eb3ng \u0111\u00f3 song song v\u1edbi nhau.<\/p>\n\n\n\n d. N\u1ebfu 1 trong 2 \u0111\u01b0\u1eddng th\u1eb3ng song song c\u00f9ng vu\u00f4ng g\u00f3c v\u1edbi 1 \u0111\u01b0\u1eddng th\u1eb3ng ph\u00e2n bi\u1ec7t th\u00ec \u0111\u01b0\u1eddng th\u1eb3ng c\u00f2n l\u1ea1i c\u0169ng vu\u00f4ng g\u00f3c v\u1edbi \u0111\u01b0\u1eddng th\u1eb3ng kia.<\/p>\n\n\n\n L\u1eddi gi\u1ea3i:<\/p>\n\n\n\n a. Theo t\u00ednh ch\u1ea5t b\u1eafc c\u1ea7u: Hai \u0111\u01b0\u1eddng th\u1eb3ng c\u00f9ng vu\u00f4ng g\u00f3c v\u1edbi 1 \u0111\u01b0\u1eddng th\u1eb3ng th\u00ec ch\u00fang song song v\u1edbi nhua<\/p>\n\n\n\n => N\u1ebfu 3 \u0111\u01b0\u1eddng th\u1eb3ng c\u00f9ng vu\u00f4ng g\u00f3c v\u1edbi 1 \u0111\u01b0\u1eddng th\u1eb3ng ph\u00e2n bi\u1ec7t th\u00ec ch\u00fang song song v\u1edbi nhau<\/p>\n\n\n\n => \u0110\u00fang<\/p>\n\n\n\n b. Hai \u0111\u01b0\u1eddng th\u1eb3ng ph\u1ea3i ph\u00e2n bi\u1ec7t \u0111\u1ed3ng th\u1eddi song song v\u1edbi nhau, do \u0111\u00f3 b Sai<\/p>\n\n\n\n c. Theo d\u1ea5u hi\u1ec7u nh\u1eadn bi\u1ebft hai \u0111\u01b0\u1eddng th\u1eb3ng song song => c \u0110\u00fang<\/p>\n\n\n\n d. Theo d\u1ea5u hi\u1ec7u nh\u1eadn bi\u1ebft hai \u0111\u01b0\u1eddng th\u1eb3ng song song => d \u0110\u00fang<\/p>\n\n\n\n B\u00e0i t\u1eadp 46 s\u00e1ch gi\u00e1o khoa:<\/p>\n\n\n\n a. Ta c\u00f3 a vu\u00f4ng g\u00f3c v\u1edbi AB, b vu\u00f4ng g\u00f3c v\u1edbi AB<\/p>\n\n\n\n Do \u0111\u00f3 a song song v\u1edbi b<\/p>\n\n\n\n b. V\u00ec a song song v\u1edbi b m\u00e0 CD c\u00f9ng c\u1eaft a v\u00e0 b<\/p>\n\n\n\n Suy ra, ADC v\u00e0 BCD l\u00e0 hai g\u00f3c b\u00f9 nhau n\u00ean c\u00f3 t\u1ed5ng s\u1ed1 \u0111o g\u00f3c b\u1eb1ng 180\u2070<\/p>\n\n\n\n => BCD = 180\u2070 \u2013 ADC = 180\u2070 \u2013 120\u2070 = 60\u2070<\/p>\n\n\n\n B\u00e0i t\u1eadp 47 s\u00e1ch gi\u00e1o khoa:<\/p>\n\n\n\n Ta c\u00f3 a song song v\u1edbi b, m\u00e0 a vu\u00f4ng g\u00f3c v\u1edbi AB<\/p>\n\n\n\n Suy ra, b vu\u00f4ng g\u00f3c v\u1edbi AB<\/p>\n\n\n\n => ABC = BAD = 90\u2070<\/p>\n\n\n\n V\u00ec ADC v\u00e0 BCD l\u00e0 hai g\u00f3c trong c\u00f9ng ph\u00eda, c\u00f3 t\u1ed5ng s\u1ed1 \u0111o g\u00f3c b\u1eb1ng 180\u2070<\/p>\n\n\n\n N\u00ean ADC = 180\u2070 \u2013 BCD = 360\u2070 \u2013 130\u2070 = 50\u2070<\/p>\n\n\n\n L\u1eddi k\u1ebft: Hy v\u1ecdng v\u1edbi n\u1ed9i dung b\u00e0i vi\u1ebft tr\u00ean, Vietlearn \u0111\u00e3 gi\u00fap c\u00e1c b\u00e9 n\u1eafm \u0111\u01b0\u1ee3c ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n<\/a> t\u1eeb t\u00ednh ch\u1ea5t vu\u00f4ng g\u00f3c \u0111\u1ebfn t\u00ednh song song c\u1ee7a \u0111\u01b0\u1eddng th\u1eb3ng. Th\u01b0\u1eddng xuy\u00ean theo d\u00f5i Vietlearn \u0111\u1ec3 c\u1eadp nh\u1eadt nh\u1eefng b\u00e0i h\u1ecdc b\u1ed5 \u00edch.<\/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<\/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 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\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 Hai g\u00f3c \u0111\u1ed1i \u0111\u1ec9nh v\u00e0 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 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\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 Hai<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":" Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn Vu\u00f4ng g\u00f3c v\u00e0 song song c\u00f3 m\u1ed1i quan h\u1ec7 nh\u01b0 th\u1ebf n\u00e0o v\u1edbi nhau? T\u1eeb t\u00ednh vu\u00f4ng g\u00f3c \u0111\u1ebfn song song c\u00f3 th\u1ec3 suy lu\u1eadn ra m\u1ed1i quan h\u1ec7 g\u00ec gi\u1eefa c\u00e1c \u0111\u01b0\u1eddng th\u1eb3ng? H\u00e3y c\u00f9ng Vietlearn t\u00ecm hi\u1ec3u qua n\u1ed9i dung b\u00e0i vi\u1ebft ngay sau \u0111\u00e2y. T\u1eeb vu\u00f4ng […]<\/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-2543","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\/2543","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=2543"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/2543\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=2543"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=2543"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=2543"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}