{"segment":[{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":" N\u1ebfu \u0111\u01b0\u1eddng th\u1eb3ng c c\u1eaft hai \u0111\u01b0\u1eddng th\u1eb3ng a, b v\u00e0 trong c\u00e1c g\u00f3c t\u1ea1o th\u00e0nh c\u00f3 m\u1ed9t c\u1eb7p g\u00f3c \u0111\u1ed3ng v\u1ecb b\u1eb1ng nhau th\u00ec a v\u00e0 b song song v\u1edbi nhau. ","select":["\u0110\u00fang","Sai "],"hint":"","explain":" Ph\u00e1t bi\u1ec3u tr\u00ean l\u00e0 \u0111\u00fang. ","column":2}]}],"id_ques":1421},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":"V\u1ebd c\u1eb7p g\u00f3c so le trong xAB, yBA c\u00f3 s\u1ed1 \u0111o \u0111\u1ec1u b\u1eb1ng $120^{o} $. <br\/> H\u1ecfi Ax c\u00f3 song song v\u1edbi By kh\u00f4ng kh\u00f4ng? ","select":["C\u00f3","Kh\u00f4ng "],"hint":"","explain":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop7/toan/hinhhoc/bai4/lv1/img\/H7C14-50.png' \/><\/center> <br\/> Ta c\u00f3 $\\widehat{xAB} = \\widehat{yBA} = 120^{o} $ m\u00e0 hai g\u00f3c n\u00e0y \u1edf v\u1ecb tr\u00ed so le trong <br\/> $\\Rightarrow$ Ax \/\/ By (d\u1ea5u hi\u1ec7u nh\u1eadn bi\u1ebft hai \u0111\u01b0\u1eddng th\u1eb3ng song song) ","column":2}]}],"id_ques":1422},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":"V\u1ebd m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng c\u1eaft hai \u0111\u01b0\u1eddng th\u1eb3ng. <br\/> Trong c\u00e1c g\u00f3c t\u1ea1o th\u00e0nh c\u00f3 m\u1ed9t c\u1eb7p g\u00f3c \u0111\u1ed3ng v\u1ecb b\u1eb1ng nhau. <br\/> Khi \u0111\u00f3, m\u1ed7i c\u1eb7p g\u00f3c trong c\u00f9ng ph\u00eda b\u00f9 nhau. \u0110\u00fang hay sai? ","select":["\u0110\u00fang","Sai "],"hint":"","explain":" <span class='basic_left'><center><img src='https://www.luyenthi123.com/file/luyenthi123/lop7/toan/hinhhoc/bai4/lv1/img\/H7C14-04.png' \/><\/center>Gi\u1ea3 s\u1eed \u0111\u01b0\u1eddng th\u1eb3ng c c\u1eaft \u0111\u01b0\u1eddng th\u1eb3ng a v\u00e0 b t\u01b0\u01a1ng \u1ee9ng \u1edf A v\u00e0 B <br\/> X\u00e9t c\u1eb7p g\u00f3c trong c\u00f9ng ph\u00eda $\\widehat{A_{4}} $ v\u00e0 $\\widehat{B_{1}} $ <br\/> Ta c\u00f3 $\\widehat{A_{4}} + \\widehat{A_{1}} = 180^{o}$ (hai g\u00f3c k\u1ec1 b\u00f9) m\u00e0 $\\widehat{A_{1}} = \\widehat{B_{1}} $ ( c\u1eb7p g\u00f3c \u0111\u1ed3ng v\u1ecb) n\u00ean $\\widehat{A_{4}} + \\widehat{B_{1}} = 180^{o} $ <br\/> X\u00e9t t\u01b0\u01a1ng t\u1ef1 v\u1edbi c\u1eb7p g\u00f3c trong c\u00f9ng ph\u00eda $\\widehat{A_{3}} $ v\u00e0 $\\widehat{B_{2}} , $ ta c\u0169ng c\u00f3 $\\widehat{A_{3}} + \\widehat{B_{2}} = 180^{o} $ <br\/>V\u1eady m\u1ed7i c\u1eb7p g\u00f3c trong c\u00f9ng ph\u00eda b\u00f9 nhau.<br\/><span class='basic_pink'> Ph\u00e1t bi\u1ec3u tr\u00ean l\u00e0 \u0110\u00fang.<\/span><\/span> ","column":2}]}],"id_ques":1423},{"time":24,"part":[{"time":3,"title":"S\u1eafp x\u1ebfp c\u00e1c c\u00e2u","title_trans":"Cho h\u00ecnh v\u1ebd, bi\u1ebft $\\widehat{A_{1}} = 60^{o}, \\widehat{B_{4}} = 120^{o} $<br\/> H\u00e3y s\u1eafp x\u1ebfp c\u00e1c \u00fd ch\u1ee9ng minh ac \/\/ bd ","temp":"sequence","correct":[[[2],[3],[5],[1],[4]]],"list":[{"point":5,"image":"https://www.luyenthi123.com/file/luyenthi123/lop7/toan/hinhhoc/bai4/lv1/img\/H7C15-25.png","left":["n\u00ean $\\widehat{A_{2}} = 120^{o} $ ","Do \u0111\u00f3 $\\widehat{B_{4}} = \\widehat{A_{2}}$","V\u1eady ac \/\/ bd ","Ta c\u00f3 $\\widehat{A_{1}} + \\widehat{A_{2}} = 180^{o} $ (hai g\u00f3c k\u1ec1 b\u00f9)","L\u1ea1i c\u00f3 $\\widehat{B_{4}}$ v\u00e0 $\\widehat{A_{2}}$ \u1edf v\u1ecb tr\u00ed so le trong v\u1edbi nhau"],"top":70,"hint":"","explain":" Ta c\u00f3 $\\widehat{A_{1}} + \\widehat{A_{2}} = 180^{o} $ (hai g\u00f3c k\u1ec1 b\u00f9) <br\/> n\u00ean $\\widehat{A_{2}}$$ = 180^{o} - \\widehat{A_{1}} \\\\ = 180^{o} - 60^{o} \\\\ = 120^{o} $ <br\/> Do \u0111\u00f3 $\\widehat{B_{4}} = \\widehat{A_{2}} (= 120^{o}) $ <br\/> L\u1ea1i c\u00f3 $\\widehat{B_{4}}$ v\u00e0 $\\widehat{A_{2}}$ \u1edf v\u1ecb tr\u00ed so le trong<br\/>V\u1eady ac \/\/ bd (v\u00ec c\u00f3 c\u1eb7p g\u00f3c so le trong b\u1eb1ng nhau)"}]}],"id_ques":1424},{"time":24,"part":[{"time":3,"title":"S\u1eafp x\u1ebfp c\u00e1c c\u00e2u","title_trans":"\u0110\u01b0\u1eddng th\u1eb3ng tt' l\u1ea7n l\u01b0\u1ee3t c\u1eaft hai \u0111\u01b0\u1eddng th\u1eb3ng x'x v\u00e0 y'y t\u1ea1i A, B. Bi\u1ebft $\\widehat{xAB} + \\widehat{ABy} = 180^{o} $ <br\/> H\u00e3y s\u1eafp x\u1ebfp c\u00e1c \u00fd ch\u1ee9ng minh x'x \/\/ y'y. ","temp":"sequence","correct":[[[2],[3],[5],[1],[4]]],"list":[{"point":5,"image":"https://www.luyenthi123.com/file/luyenthi123/lop7/toan/hinhhoc/bai4/lv1/img\/H7C15-08.png","left":["m\u00e0 $\\widehat{xAB} + \\widehat{ABy} = 180^{o} $ ","Do \u0111\u00f3 $\\widehat{tAx} = \\widehat{ABy}$","V\u1eady x'x \/\/ y'y ","Ta c\u00f3 $\\widehat{tAx} + \\widehat{xAB} = 180^{o} $","M\u00e0 $\\widehat{tAx}$ v\u00e0 $\\widehat{ABy}$ \u1edf v\u1ecb tr\u00ed \u0111\u1ed3ng v\u1ecb v\u1edbi nhau"],"top":70,"hint":"","explain":"Ta c\u00f3 $\\widehat{tAx} + \\widehat{xAB} = 180^{o} $ (hai g\u00f3c k\u1ec1 b\u00f9) <br\/> m\u00e0 $\\widehat{xAB} + \\widehat{ABy} = 180^{o} $ (gi\u1ea3 thi\u1ebft) <br\/> Do \u0111\u00f3 $\\widehat{tAx} = \\widehat{ABy}$ <br\/> V\u1eady x'x \/\/ y'y (v\u00ec c\u00f3 hai g\u00f3c \u0111\u1ed3ng v\u1ecb b\u1eb1ng nhau). "}]}],"id_ques":1425},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"V\u1ebd hai \u0111\u01b0\u1eddng th\u1eb3ng xx' v\u00e0 yy' sao cho xx' \/\/ yy'. V\u1ebd \u0111\u01b0\u1eddng th\u1eb3ng zz' c\u1eaft xx' t\u1ea1i M, c\u1eaft yy' t\u1ea1i N. <br\/> Ta \u0111\u01b0\u1ee3c h\u00ecnh v\u1ebd \u0111\u00fang l\u00e0? <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop7/toan/hinhhoc/bai4/lv1/img\/H7C15-06A.png' \/><img src='https://www.luyenthi123.com/file/luyenthi123/lop7/toan/hinhhoc/bai4/lv1/img\/H7C15-06B.png' \/><\/center> ","select":["A. H\u00ecnh 1","B. H\u00ecnh 2 ","C. H\u00ecnh 3 ","D. C\u00e1c h\u00ecnh tr\u00ean \u0111\u1ec1u \u0111\u00fang "],"hint":"","explain":" C\u00e1c h\u00ecnh tr\u00ean \u0111\u1ec1u \u0111\u00fang. <br\/> <span class='basic_pink'>\u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 D. <\/span>","column":2}]}],"id_ques":1426},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"Cho \u0111\u01b0\u1eddng th\u1eb3ng n c\u1eaft hai \u0111\u01b0\u1eddng th\u1eb3ng a, b v\u00e0 trong c\u00e1c g\u00f3c t\u1ea1o th\u00e0nh c\u00f3 m\u1ed9t c\u1eb7p g\u00f3c \u0111\u1ed3ng v\u1ecb b\u1eb1ng nhau th\u00ec: ","select":["A. $a \\perp b $","B. $ a \\equiv b $","C. $ a \/\/ b $","D. $a \\cap b $ "],"hint":"","explain":" \u0110\u01b0\u1eddng th\u1eb3ng n c\u1eaft hai \u0111\u01b0\u1eddng th\u1eb3ng a, b v\u00e0 trong c\u00e1c g\u00f3c t\u1ea1o th\u00e0nh c\u00f3 m\u1ed9t c\u1eb7p g\u00f3c \u0111\u1ed3ng v\u1ecb b\u1eb1ng nhau th\u00ec: <br\/> a \/\/ b . <br\/> <span class='basic_pink'>\u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 C. <\/span>","column":2}]}],"id_ques":1427},{"time":9,"part":[{"title":"Ch\u1ecdn nh\u1eefng \u0111\u00e1p \u00e1n \u0111\u00fang","title_trans":"Ch\u1ecdn \u0111\u01b0\u1ee3c nhi\u1ec1u \u0111\u00e1p \u00e1n","temp":"checkbox","correct":[["1","2","4"]],"list":[{"point":5,"ques":"Cho h\u00ecnh v\u1ebd nh\u01b0 sau, bi\u1ebft $\\widehat{M_{1}} = \\widehat{P_{1}} = \\widehat{R_{1}}$. C\u00e1c \u0111o\u1ea1n th\u1eb3ng n\u00e0o song song v\u1edbi nhau. <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop7/toan/hinhhoc/bai4/lv1/img\/H7C14-42.png' \/><\/center>","hint":"","column":3,"number_true":2,"select":["MN \/\/ PQ","MN \/\/ RS","MP \/\/ NQ","PQ \/\/ RS","PR \/\/ QS","MR \/\/ NS"],"explain":"Ta c\u00f3: $\\widehat{M_{1}} = \\widehat{P_{1}}$, m\u00e0 $\\widehat{M_{1}}$ v\u00e0 $\\widehat{P_{1}}$ \u1edf v\u1ecb tr\u00ed \u0111\u1ed3ng v\u1ecb v\u1edbi nhau<br\/>N\u00ean MN \/\/ PQ<br\/>+ $\\widehat{M_{P}} = \\widehat{R_{1}}$, m\u00e0 $\\widehat{P_{1}}$ v\u00e0 $\\widehat{R_{1}}$ \u1edf v\u1ecb tr\u00ed \u0111\u1ed3ng v\u1ecb v\u1edbi nhau<br\/>N\u00ean PQ \/\/ RS <br\/>+ $\\widehat{M_{1}} = \\widehat{R_{1}}$, m\u00e0 $\\widehat{M_{1}}$ v\u00e0 $\\widehat{R_{1}}$ \u1edf v\u1ecb tr\u00ed \u0111\u1ed3ng v\u1ecb v\u1edbi nhau<br\/>N\u00ean MN \/\/ RS<br\/>C\u00e1c \u0111o\u1ea1n th\u1eb3ng song song v\u1edbi nhau l\u00e0: MN \/\/ PQ, MN \/\/ RS v\u00e0 PQ \/\/ RS "}]}],"id_ques":1428},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":"Cho g\u00f3c nh\u1ecdn $\\widehat{xOy} $ v\u00e0 m\u1ed9t \u0111i\u1ec3m O'. H\u00e3y v\u1ebd m\u1ed9t g\u00f3c nh\u1ecdn $\\widehat{x'O'y'} $ c\u00f3 O'x' \/\/ Ox v\u00e0 O'y' \/\/ Oy. <br\/> D\u00f9ng th\u01b0\u1edbc \u0111o g\u00f3c ki\u1ec3m tra xem hai g\u00f3c $\\widehat{xOy}$ v\u00e0 $\\widehat{x'Oy'}$ c\u00f3 b\u1eb1ng nhau kh\u00f4ng? ","select":["C\u00f3","Kh\u00f4ng "],"hint":"","explain":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop7/toan/hinhhoc/bai4/lv1/img\/H7C14-40.png' \/><\/center> <br\/> D\u00f9ng th\u01b0\u1edbc \u0111o g\u00f3c, ta ki\u1ec3m tra th\u1ea5y $\\widehat{xOy} = \\widehat{x'O'y'} $ <span class='basic_left'> <b> Ch\u00fa \u00fd <\/b> <br\/> Gi\u1ea3i th\u00edch $\\widehat{xOy} = \\widehat{x'O'y'} $ nh\u01b0 sau: <br\/> G\u1ecdi S l\u00e0 giao \u0111i\u1ec3m c\u1ee7a hai tia Ox v\u00e0 O'y'. <br\/> Ta c\u00f3 Oy \/\/ O'y' t\u1ee9c l\u00e0 Oy \/\/ Sy', suy ra $\\widehat{xOy} = \\widehat{xSy'} $ (hai g\u00f3c \u0111\u1ed3ng v\u1ecb) <br\/> T\u01b0\u01a1ng t\u1ef1: $\\widehat{x'O'y'} = \\widehat{xSy'} $ (hai g\u00f3c \u0111\u1ed3ng v\u1ecb) <br\/> Do \u0111\u00f3: $\\widehat{xOy} = \\widehat{x'O'y'} (= \\widehat{xSy'}) $ <\/span> ","column":2}]}],"id_ques":1429},{"time":24,"part":[{"time":3,"title":"N\u1ed1i t\u1eeb ho\u1eb7c c\u1ee5m t\u1eeb \u1edf c\u1ed9t b\u00ean tr\u00e1i v\u1edbi c\u1ed9t b\u00ean ph\u1ea3i \u0111\u1ec3 \u0111\u01b0\u1ee3c c\u00e2u ho\u00e0n ch\u1ec9nh","title_trans":"","audio":"","temp":"matching","correct":[["4","3","1","2"]],"list":[{"point":5,"image":"","left":["N\u1ebfu a v\u00e0 b c\u1eaft c m\u00e0 trong c\u00e1c g\u00f3c t\u1ea1o th\u00e0nh c\u00f3 m\u1ed9t c\u1eb7p g\u00f3c so le trong ... th\u00ec a \/\/ b ","N\u1ebfu a v\u00e0 b c\u1eaft c m\u00e0 trong c\u00e1c g\u00f3c t\u1ea1o th\u00e0nh c\u00f3 m\u1ed9t c\u1eb7p g\u00f3c trong c\u00f9ng ph\u00eda ... th\u00ec a \/\/ b","Hai \u0111\u01b0\u1eddng th\u1eb3ng ph\u00e2n bi\u1ec7t ho\u1eb7c ... ho\u1eb7c song song. ","Hai \u0111\u01b0\u1eddng th\u1eb3ng ... l\u00e0 hai \u0111\u01b0\u1eddng th\u1eb3ng kh\u00f4ng c\u00f3 \u0111i\u1ec3m chung. "],"right":["c\u1eaft nhau ","song song","b\u00f9 nhau","b\u1eb1ng nhau"],"top":100,"hint":"","explain":"N\u1ebfu a v\u00e0 b c\u1eaft c m\u00e0 trong c\u00e1c g\u00f3c t\u1ea1o th\u00e0nh c\u00f3 m\u1ed9t c\u1eb7p g\u00f3c so le trong b\u1eb1ng nhau th\u00ec a \/\/ b <br\/> N\u1ebfu a v\u00e0 b c\u1eaft c m\u00e0 trong c\u00e1c g\u00f3c t\u1ea1o th\u00e0nh c\u00f3 m\u1ed9t c\u1eb7p g\u00f3c trong c\u00f9ng ph\u00eda b\u00f9 nhau th\u00ec a \/\/ b <br\/> Hai \u0111\u01b0\u1eddng th\u1eb3ng ph\u00e2n bi\u1ec7t ho\u1eb7c c\u1eaft nhau ho\u1eb7c song song. <br\/>Hai \u0111\u01b0\u1eddng th\u1eb3ng song song l\u00e0 hai \u0111\u01b0\u1eddng th\u1eb3ng kh\u00f4ng c\u00f3 \u0111i\u1ec3m chung. "}]}],"id_ques":1430},{"time":9,"part":[{"title":"Ch\u1ecdn nh\u1eefng \u0111\u00e1p \u00e1n \u0111\u00fang","title_trans":"Ch\u1ecdn \u0111\u01b0\u1ee3c nhi\u1ec1u \u0111\u00e1p \u00e1n","temp":"checkbox","correct":[["1","4"]],"list":[{"point":5,"ques":"Cho H\u00ecnh 21, bi\u1ebft $\\widehat{A_{1}} = \\widehat{C_{1}}$, $\\widehat{B_{1}} = \\widehat{D_{1}}$. C\u00e1c \u0111o\u1ea1n th\u1eb3ng n\u00e0o song song v\u1edbi nhau? <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop7/toan/hinhhoc/bai4/lv1/img\/H7C14-21.png' \/><\/center>","hint":"","column":2,"number_true":2,"select":["AB \/\/ CD","AB \/\/ AC","AC \/\/ BD","AD \/\/ BC "],"explain":"<span class='basic_left'>Ta c\u00f3: $\\widehat{A_{1}} = \\widehat{C_{1}}$, m\u00e0 $\\widehat{A_{1}}$ v\u00e0 $\\widehat{C_{1}}$ \u1edf v\u1ecb tr\u00ed so le trong<br\/>N\u00ean AB \/\/ CD<br\/>L\u1ea1i c\u00f3: $\\widehat{B_{1}} = \\widehat{D_{1}}$, $\\widehat{B_{1}}$ v\u00e0 $\\widehat{D_{1}}$ \u1edf v\u1ecb tr\u00ed so le trong<br\/>N\u00ean AD \/\/ BC<br\/>V\u1eady c\u00e1c \u0111o\u1ea1n th\u1eb3ng song song v\u1edbi nhau l\u00e0: AB \/\/ CD v\u00e0 AD \/\/ BC<\/span> "}]}],"id_ques":1431},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":"\u1ede H\u00ecnh 33, n\u1ebfu bi\u1ebft $\\widehat{A_{2}} = 63^{o}; \\widehat{B_{2}} = 63^{o} $ <br\/> th\u00ec hai \u0111\u01b0\u1eddng th\u1eb3ng a v\u00e0 b c\u00f3 song song v\u1edbi nhau kh\u00f4ng? <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop7/toan/hinhhoc/bai4/lv1/img\/H7C14-33.png' \/><\/center> ","select":["C\u00f3","Kh\u00f4ng "],"hint":"","explain":" $\\widehat{A_{2}} $ v\u00e0 $\\widehat{B_{2}} $ l\u00e0 c\u1eb7p g\u00f3c \u1edf v\u1ecb tr\u00ed so le trong v\u00e0 b\u1eb1ng nhau, <br\/> t\u1ea1o b\u1edfi \u0111\u01b0\u1eddng th\u1eb3ng c c\u1eaft hai \u0111\u01b0\u1eddng th\u1eb3ng a, b n\u00ean a \/\/ b. ","column":2}]}],"id_ques":1432},{"time":24,"part":[{"title":"\u0110i\u1ec1n t\u1eeb th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["120"]]],"list":[{"point":5,"width":40,"content":"","type_input":"","ques":"\u1ede H\u00ecnh 32, n\u1ebfu bi\u1ebft $\\widehat{A_{1}} = 120^{o}$ <br\/> th\u00ec s\u1ed1 \u0111o g\u00f3c $\\widehat{B_{3}} $ ph\u1ea3i b\u1eb1ng bao nhi\u00eau \u0111\u1ec3 a \/\/ b ? <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop7/toan/hinhhoc/bai4/lv1/img\/H7C14-32B.png' \/><\/center> <br\/> \u0110\u00e1p \u00e1n: $\\widehat{B_{3}} = \\FormInput[40][bl_elm_true basic_elm basic_blank basic_blank_part]{}^{o} $ ","hint":"","explain":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop7/toan/hinhhoc/bai4/lv1/img\/H7C14-32C.png' \/><\/center> <br\/> Ta c\u00f3 $\\widehat{A_{1}}$ v\u00e0 $\\widehat{B_{3}}$ l\u00e0 hai g\u00f3c \u1edf v\u1ecb tr\u00ed so le trong, <br\/> n\u00ean \u0111\u1ec3 a \/\/ b th\u00ec $ \\widehat{B_{3}} = \\widehat{A_{1}} = 120^{o}$ <br\/> <br\/> <span class='basic_pink'>V\u1eady $\\widehat{B_{3}} = 120^{o}$<\/span> "}]}],"id_ques":1433},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"Cho h\u00ecnh v\u1ebd bi\u1ebft: $\\widehat{H_{1}} = \\widehat{K_{1}} $ v\u00e0 $\\widehat{K_{2}} = \\widehat{E_{2}} $ . <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop7/toan/hinhhoc/bai4/lv1/img\/H7C14-31.png' \/><\/center> Ta c\u00f3 c\u00e1c \u0111\u01b0\u1eddng th\u1eb3ng song song l\u00e0: ","select":["A.Hx \/\/ Ky ","B. Ky \/\/ Ez ","C. Hx \/\/ Ky v\u00e0 Ky \/\/ Ez ","D. Hx \/\/ Ky; Ky \/\/ Ez v\u00e0 Hx \/\/ Ez "],"hint":"","explain":" Ta c\u00f3 $\\widehat{H_{1}} = \\widehat{K_{1}} $ , m\u00e0 hai g\u00f3c \u1edf v\u1ecb tr\u00ed so le trong n\u00ean Hx \/\/ Ky <br\/> M\u1eb7t kh\u00e1c $\\widehat{K_{2}} = \\widehat{E_{2}} $ , hai g\u00f3c \u1edf v\u1ecb tr\u00ed so le trong n\u00ean Ky \/\/ Ez <br\/> C\u00f3 Hx \/\/ Ky, Ky \/\/ Ez n\u00ean Hx \/\/ Ez <br\/> <br\/> <span class='basic_pink'>\u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 D. <\/span>","column":2}]}],"id_ques":1434},{"time":24,"part":[{"time":3,"title":"S\u1eafp x\u1ebfp c\u00e1c c\u00e2u","title_trans":"Cho h\u00ecnh v\u1ebd, bi\u1ebft $\\widehat{F} = \\widehat{H_{1}}; \\widehat{K} = \\widehat{H_{2}} $ <br\/> H\u00e3y s\u1eafp x\u1ebfp ch\u1ee9ng minh EF \/\/ IK. ","temp":"sequence","correct":[[[3],[2],[1],[4]]],"list":[{"point":5,"image":"https://www.luyenthi123.com/file/luyenthi123/lop7/toan/hinhhoc/bai4/lv1/img\/H7C14-18.png","left":["n\u00ean $\\widehat{F} = \\widehat{K} $","m\u00e0 $\\widehat{H_{1}} = \\widehat{H_{2}}$ (\u0111\u1ed1i \u0111\u1ec9nh) ","Ta c\u00f3: $\\widehat{F} = \\widehat{H_{1}}; \\widehat{K} = \\widehat{H_{2}} $ ","Suy ra: EF \/\/ IK (v\u00ec c\u00f3 c\u1eb7p g\u00f3c so le trong b\u1eb1ng nhau)"],"top":55,"hint":"","explain":"Ta c\u00f3: $\\widehat{F} = \\widehat{H_{1}}; \\widehat{K} = \\widehat{H_{2}} $ , m\u00e0 $\\widehat{H_{1}} = \\widehat{H_{2}}$ (\u0111\u1ed1i \u0111\u1ec9nh) <br\/> n\u00ean $\\widehat{F} = \\widehat{K} $ <br\/>Suy ra: EF \/\/ IK (v\u00ec c\u00f3 c\u1eb7p g\u00f3c so le trong b\u1eb1ng nhau) "}]}],"id_ques":1435},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"V\u1ebd c\u1eb7p g\u00f3c so le trong xAB v\u00e0 yBA sao cho: $\\widehat{xAB} = 56^{o}, \\widehat{yBA} = 65^{o} $. Ta c\u00f3: ","select":["A. Ax song song v\u1edbi By ","B. Ax c\u1eaft By ","C. Ax vu\u00f4ng g\u00f3c v\u1edbi By ","D. Ax tr\u00f9ng v\u1edbi By "],"hint":"","explain":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop7/toan/hinhhoc/bai4/lv1/img\/H7C14-08.png' \/><\/center> Ta c\u00f3 $\\widehat{xAB}$ v\u00e0 $\\widehat{yBA}$ l\u00e0 c\u1eb7p g\u00f3c so le trong nh\u01b0ng $\\widehat{xAB} \\neq \\widehat{yBA} $ n\u00ean <br\/> Ax c\u1eaft By. <br\/> <br\/> <span class='basic_pink'>\u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 B. <\/span>","column":2}]}],"id_ques":1436},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"Kh\u1eb3ng \u0111\u1ecbnh n\u00e0o sau \u0111\u00e2y \u0111\u00fang nh\u1ea5t? ","select":["Hai \u0111o\u1ea1n th\u1eb3ng song song l\u00e0 hai \u0111o\u1ea1n th\u1eb3ng kh\u00f4ng c\u1eaft nhau. ","Hai \u0111o\u1ea1n th\u1eb3ng song song l\u00e0 hai \u0111o\u1ea1n th\u1eb3ng n\u1eb1m tr\u00ean hai \u0111\u01b0\u1eddng th\u1eb3ng song song. "],"hint":"","explain":"Hai \u0111o\u1ea1n th\u1eb3ng song song l\u00e0 hai \u0111o\u1ea1n th\u1eb3ng n\u1eb1m tr\u00ean hai \u0111\u01b0\u1eddng th\u1eb3ng song song.","column":1}]}],"id_ques":1437},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":"Cho ba \u0111\u01b0\u1eddng th\u1eb3ng ph\u00e2n bi\u1ec7t, <br\/> n\u1ebfu m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng song song v\u1edbi m\u1ed9t trong hai \u0111\u01b0\u1eddng th\u1eb3ng song song th\u00ec n\u00f3: ","select":["A. song song v\u1edbi \u0111\u01b0\u1eddng c\u00f2n l\u1ea1i. ","B. c\u1eaft \u0111\u01b0\u1eddng c\u00f2n l\u1ea1i.","C. vu\u00f4ng g\u00f3c v\u1edbi \u0111\u01b0\u1eddng c\u00f2n l\u1ea1i. ","D. tr\u00f9ng v\u1edbi \u0111\u01b0\u1eddng c\u00f2n l\u1ea1i. "],"hint":"","explain":"Ba \u0111\u01b0\u1eddng th\u1eb3ng ph\u00e2n bi\u1ec7t, n\u1ebfu m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng song song v\u1edbi m\u1ed9t trong hai \u0111\u01b0\u1eddng th\u1eb3ng song song th\u00ec n\u00f3: <br\/> song song v\u1edbi \u0111\u01b0\u1eddng c\u00f2n l\u1ea1i. <br\/> <br\/><span class='basic_pink'>\u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 A. <\/span> ","column":2}]}],"id_ques":1438},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"N\u1ebfu \u0111\u01b0\u1eddng th\u1eb3ng c c\u1eaft hai \u0111\u01b0\u1eddng th\u1eb3ng a, b v\u00e0 trong c\u00e1c g\u00f3c t\u1ea1o th\u00e0nh c\u00f3 m\u1ed9t c\u1eb7p g\u00f3c so le trong b\u1eb1ng nhau th\u00ec:","select":["A. $a \\perp b $","B. $ a \\equiv b $","C. $ a \/\/ b $","D. $a \\cap b $ "],"hint":"","explain":" N\u1ebfu \u0111\u01b0\u1eddng th\u1eb3ng c c\u1eaft hai \u0111\u01b0\u1eddng th\u1eb3ng a, b v\u00e0 trong c\u00e1c g\u00f3c t\u1ea1o th\u00e0nh c\u00f3 m\u1ed9t c\u1eb7p g\u00f3c so le trong b\u1eb1ng nhau th\u00ec: <br\/> a song song v\u1edbi b (a \/\/b) <br\/> <span class='basic_pink'>\u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 C. <\/span>","column":2}]}],"id_ques":1439},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":" Hai \u0111\u01b0\u1eddng th\u1eb3ng song song l\u00e0 hai \u0111\u01b0\u1eddng th\u1eb3ng kh\u00f4ng c\u00f3 \u0111i\u1ec3m chung. ","select":["\u0110\u00fang","Sai "],"hint":"","explain":" <span class='basic_pink'>Hai \u0111\u01b0\u1eddng th\u1eb3ng song song l\u00e0 hai \u0111\u01b0\u1eddng th\u1eb3ng kh\u00f4ng c\u00f3 \u0111i\u1ec3m chung. <\/span> ","column":2}]}],"id_ques":1440}],"lesson":{"save":0,"level":1}}