{"segment":[{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":10,"ques":" Kh\u1eb3ng \u0111\u1ecbnh n\u00e0o sau \u0111\u00e2y l\u00e0 sai: ","select":["A. Hai \u0111\u01b0\u1eddng th\u1eb3ng ph\u00e2n bi\u1ec7t c\u00f9ng vu\u00f4ng g\u00f3c v\u1edbi m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng th\u1ee9 ba th\u00ec ch\u00fang song song v\u1edbi nhau. ","B. Cho hai \u0111\u01b0\u1eddng th\u1eb3ng a v\u00e0 b song song v\u1edbi nhau, n\u1ebfu \u0111\u01b0\u1eddng th\u1eb3ng c c\u1eaft a th\u00ec \u0111\u01b0\u1eddng th\u1eb3ng c c\u0169ng c\u1eaft b. ","C. N\u1ebfu hai \u0111\u01b0\u1eddng th\u1eb3ng ph\u00e2n bi\u1ec7t c\u00f9ng song song v\u1edbi \u0111\u01b0\u1eddng th\u1eb3ng th\u1ee9 ba th\u00ec ch\u00fang song song v\u1edbi nhau. ","D. C\u00f3 duy nh\u1ea5t m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng song song v\u1edbi m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng cho tr\u01b0\u1edbc. "],"hint":"","explain":" <span class='basic_pink'>Kh\u1eb3ng \u0111\u1ecbnh sai l\u00e0 D. V\u00ec: <br\/> C\u00f3 v\u00f4 s\u1ed1 \u0111\u01b0\u1eddng th\u1eb3ng song song v\u1edbi m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng cho tr\u01b0\u1edbc. <\/span> ","column":1}]}],"id_ques":1501},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00fang hay sai","title_trans":"","temp":"true_false","correct":[["f","t","t","f"]],"list":[{"point":10,"image":"","col_name":["","\u0110\u00fang","Sai"],"arr_ques":["N\u1ebfu \u0111\u01b0\u1eddng th\u1eb3ng a vu\u00f4ng g\u00f3c v\u1edbi \u0111\u01b0\u1eddng th\u1eb3ng b, \u0111\u01b0\u1eddng th\u1eb3ng b l\u1ea1i vu\u00f4ng g\u00f3c v\u1edbi \u0111\u01b0\u1eddng th\u1eb3ng c th\u00ec \u0111\u01b0\u1eddng th\u1eb3ng a vu\u00f4ng g\u00f3c v\u1edbi \u0111\u01b0\u1eddng th\u1eb3ng c. ","N\u1ebfu \u0111\u01b0\u1eddng th\u1eb3ng a song song v\u1edbi \u0111\u01b0\u1eddng th\u1eb3ng b, \u0111\u01b0\u1eddng th\u1eb3ng b l\u1ea1i song song v\u1edbi \u0111\u01b0\u1eddng th\u1eb3ng c th\u00ec \u0111\u01b0\u1eddng th\u1eb3ng a song song v\u1edbi \u0111\u01b0\u1eddng th\u1eb3ng c ","N\u1ebfu $a \\perp c$ v\u00e0 $b \\perp c$ th\u00ec a \/\/ b ","N\u1ebfu a \/\/ b v\u00e0 $c \\perp b$ th\u00ec c \/\/ a"],"hint":"V\u1ebd h\u00ecnh \u0111\u1ec3 t\u00ecm \u0111\u00e1p \u00e1n","explain":["Sai. <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop7/toan/hinhhoc/bai6/lv3/img\/H7C16-05.png' \/><\/center> ","<br\/> \u0110\u00fang","<br\/> \u0110\u00fang","<br\/> Sai <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop7/toan/hinhhoc/bai6/lv3/img\/H7C16-06.png' \/><\/center> "]}]}],"id_ques":1502},{"time":24,"part":[{"title":"\u0110i\u1ec1n t\u1eeb th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"\u0110\u00e2y l\u00e0 g\u00f3i Combo 2 c\u00e2u. ","temp":"fill_the_blank","correct":[[["30"]]],"list":[{"point":10,"width":40,"content":"","type_input":"","ques":" <span class='basic_left'> Cho tam gi\u00e1c ABC c\u00f3 $\\widehat{A} = 90^{o} $. K\u1ebb $ AH \\perp BC (H \\in BC)$. K\u1ebb $ HE \\perp AC (E \\in AC)$. <br\/> Cho bi\u1ebft $\\widehat{B} = 60^{o} $ <br\/> <u>C\u00e2u 1: <\/u> S\u1ed1 \u0111o g\u00f3c $ \\widehat{AHE} $ l\u00e0: $\\FormInput[40][bl_elm_true basic_elm basic_blank basic_blank_part]{}^{o}$<\/span>","hint":"","explain":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop7/toan/hinhhoc/bai6/lv3/img\/H7C16-29.png' \/><\/center> <span class='basic_left'> Ta c\u00f3 $ AB \\perp AC, HE \\perp AC $ n\u00ean AB \/\/ HE (quan h\u1ec7 gi\u1eefa t\u00ednh vu\u00f4ng g\u00f3c v\u1edbi t\u00ednh song song) <br\/> AB \/\/ HE suy ra $\\widehat{ABH} = \\widehat{EHC} = 60^{o} $ (hai g\u00f3c \u0111\u1ed3ng v\u1ecb) <br\/> C\u00f3 $\\widehat{AHC} = \\widehat{AHE} + \\widehat{EHC} $<br\/> $ \\Rightarrow \\widehat{AHE} $$= \\widehat{AHC} - \\widehat{EHC} \\\\ = 90^{o} - 60^{o} \\\\ = 30^{o} $ <\/span> <br\/> <br\/> <span class='basic_pink'> V\u1eady $ \\widehat{AHE} = 30^{o}$<\/span> "}]}],"id_ques":1503},{"time":24,"part":[{"title":"\u0110i\u1ec1n t\u1eeb th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"\u0110\u00e2y l\u00e0 g\u00f3i Combo 2 c\u00e2u. ","temp":"fill_the_blank","correct":[[["30"]]],"list":[{"point":10,"width":40,"content":"","type_input":"","ques":" <span class='basic_left'> Cho tam gi\u00e1c ABC c\u00f3 $\\widehat{A} = 90^{o} $. K\u1ebb $ AH \\perp BC (H \\in BC)$. K\u1ebb $ HE \\perp AC (E \\in AC)$. <br\/> Cho bi\u1ebft $\\widehat{B} = 60^{o} $ <br\/> <u>C\u00e2u 2: <\/u> S\u1ed1 \u0111o g\u00f3c $ \\widehat{BAH} $ l\u00e0: $\\FormInput[40][bl_elm_true basic_elm basic_blank basic_blank_part]{}^{o}$<\/span>","hint":"","explain":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop7/toan/hinhhoc/bai6/lv3/img\/H7C16-29.png' \/><\/center> <span class='basic_left'> Ta c\u00f3 AB \/\/ HE (theo c\u00e2u 1) <br\/> Suy ra $\\widehat{BAH} = \\widehat{AHE} = 30^{o} $ (hai g\u00f3c so le trong) <\/span> <br\/> <br\/> <span class='basic_pink'> V\u1eady $ \\widehat{BAH} = 30^{o}$<\/span> "}]}],"id_ques":1504},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00fang hay sai","title_trans":"","temp":"true_false","correct":[["t","f","f","t"]],"list":[{"point":10,"image":"","ques":" Trong c\u00e1c c\u00e2u sau c\u00e2u n\u00e0o cho m\u1ed9t \u0111\u1ecbnh l\u00fd. ","col_name":["","\u0110\u00fang","Sai"],"arr_ques":["\u0110\u01b0\u1eddng th\u1eb3ng n\u00e0o vu\u00f4ng g\u00f3c v\u1edbi m\u1ed9t trong hai \u0111\u01b0\u1eddng th\u1eb3ng song song th\u00ec vu\u00f4ng g\u00f3c v\u1edbi \u0111\u01b0\u1eddng th\u1eb3ng kia. ","\u0110\u01b0\u1eddng th\u1eb3ng n\u00e0o vu\u00f4ng g\u00f3c v\u1edbi m\u1ed9t trong hai \u0111\u01b0\u1eddng th\u1eb3ng c\u1eaft nhau th\u00ec c\u1eaft \u0111\u01b0\u1eddng th\u1eb3ng kia. ","N\u1ebfu hai \u0111\u01b0\u1eddng th\u1eb3ng AB v\u00e0 AC c\u00f9ng song song v\u1edbi m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng th\u1ee9 ba th\u00ec hai \u0111\u01b0\u1eddng th\u1eb3ng \u0111\u00f3 song song. ","N\u1ebfu hai \u0111\u01b0\u1eddng th\u1eb3ng c\u00f9ng vu\u00f4ng g\u00f3c v\u1edbi \u0111\u01b0\u1eddng th\u1eb3ng th\u1ee9 ba th\u00ec hai \u0111\u01b0\u1eddng th\u1eb3ng \u0111\u00f3 song song. "],"hint":"","explain":["\u0110\u00fang. ","<br\/> Sai. V\u00ed d\u1ee5, tr\u00ean h\u00ecnh d\u01b0\u1edbi ta c\u00f3 a c\u1eaft b, $c \\perp a $ nh\u01b0ng c kh\u00f4ng c\u1eaft b <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop7/toan/hinhhoc/bai6/lv3/img\/H7C16-33.png' \/><\/center>","<br\/> Sai. V\u00ec theo ti\u00ean \u0111\u1ec1 \u01a0-clit th\u00ec AB tr\u00f9ng v\u1edbi AC ","<br\/> \u0110\u00fang "]}]}],"id_ques":1505},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":10,"ques":" Ph\u00e1t bi\u1ec3u n\u00e0o sau \u0111\u00e2y kh\u00f4ng ph\u1ea3i l\u00e0 \u0111\u1ecbnh l\u00fd: ","select":["A. N\u1ebfu m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng vu\u00f4ng g\u00f3c v\u1edbi m\u1ed9t trong hai \u0111\u01b0\u1eddng th\u1eb3ng song song th\u00ec n\u00f3 c\u0169ng vu\u00f4ng g\u00f3c v\u1edbi \u0111\u01b0\u1eddng th\u1eb3ng kia. ","B. N\u1ebfu hai \u0111\u01b0\u1eddng th\u1eb3ng xx' v\u00e0 yy' c\u1eaft nhau t\u1ea1i A v\u00e0 g\u00f3c xAy vu\u00f4ng th\u00ec c\u00e1c g\u00f3c $\\widehat{yAx'}, \\widehat{x'Ay'}, \\widehat{y'Ax} $ \u0111\u1ec1u l\u00e0 g\u00f3c vu\u00f4ng. ","C. N\u1ebfu m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng c\u1eaft hai \u0111\u01b0\u1eddng th\u1eb3ng sao cho c\u00f3 m\u1ed9t c\u1eb7p g\u00f3c so le trong b\u1eb1ng nhau th\u00ec hai \u0111\u01b0\u1eddng th\u1eb3ng \u0111\u00f3 song song. ","D. N\u1ebfu hai \u0111\u01b0\u1eddng th\u1eb3ng AB v\u00e0 AC c\u00f9ng song song v\u1edbi m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng th\u1ee9 ba th\u00ec hai \u0111\u01b0\u1eddng th\u1eb3ng \u0111\u00f3 song song. "],"hint":"","explain":" Ph\u00e1t bi\u1ec3u kh\u00f4ng ph\u1ea3i \u0111\u1ecbnh l\u00fd l\u00e0: D V\u00ec: <br\/> Theo ti\u00ean \u0111\u1ec1 \u01a0-clit hai \u0111\u01b0\u1eddng th\u1eb3ng AB v\u00e0 AC tr\u00f9ng nhau. <br\/> <br\/> <span class='basic_pink'>Ch\u1ecdn \u0111\u00e1p \u00e1n D. <\/span> ","column":1}]}],"id_ques":1506},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":10,"ques":" N\u1ebfu hai g\u00f3c nh\u1ecdn $\\widehat{xOy} $ v\u00e0 $\\widehat{x'O'y'} $ c\u00f3 Ox \/\/ O'y'; Oy \/\/ O'x' th\u00ec: ","select":["A. $\\widehat{xOy} = \\widehat{x'O'y'} $","B. $\\widehat{xOy} < \\widehat{x'O'y'} $ ","C. $\\widehat{xOy} > \\widehat{x'O'y'} $","D. $\\widehat{xOy} + \\widehat{x'O'y'} = 180^{o} $ "],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/><center><img src='https://www.luyenthi123.com/file/luyenthi123/lop7/toan/hinhhoc/bai6/lv3/img\/H7C16-32.png' \/><\/center> G\u1ecdi giao \u0111i\u1ec3m c\u1ee7a Oy v\u00e0 O'y' l\u00e0 A<br\/>Oy \/\/ O'x' (gt)<br\/>$\\Rightarrow$ $\\widehat{OAO'} $ = $\\widehat{x'O'y'} $ (c\u1eb7p g\u00f3c so le trong) <b>(1)<\/b><br\/>L\u1ea1i c\u00f3: Ox \/\/ O'y' (gt)<br\/>$\\Rightarrow$ $\\widehat{OAO'} $ = $\\widehat{xOy} $ (c\u1eb7p g\u00f3c so le trong) <b>(2)<\/b><br\/>T\u1eeb (1) v\u00e0 (2) $\\Rightarrow$ $\\widehat{xOy} $ = $\\widehat{x'O'y'} $<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'>A. <\/span>$\\widehat{xOy} = \\widehat{x'O'y'} $<\/span> <br\/><\/span> ","column":2}]}],"id_ques":1507},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":10,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop7/toan/hinhhoc/bai6/lv3/img\/H7C16-31.png' \/><\/center> Trong ch\u1ee9ng minh \u0111\u1ecbnh l\u00fd ''Hai g\u00f3c \u0111\u1ed1i \u0111\u1ec9nh th\u00ec b\u1eb1ng nhau.'' <br\/> B\u1ea1n An, v\u00e0 B\u00ecnh \u0111\u00e3 l\u00e0m nh\u01b0 sau: <br\/> An:<table><tr><th><\/th><th>C\u00e1c kh\u1eb3ng \u0111\u1ecbnh<\/th><th>C\u0103n c\u1ee9 c\u1ee7a kh\u1eb3ng \u0111\u1ecbnh<\/th><\/tr><tr><td>1<\/td><td>$\\widehat{O_{1}} + \\widehat{O_{2}} = 180^{o} $<\/td><td> V\u00ec $\\widehat{O_{1}} $ v\u00e0 $\\widehat{O_{2}}$ k\u1ec1 b\u00f9 <\/td><\/tr><tr><td>2<\/td><td>$\\widehat{O_{3}} + \\widehat{O_{2}} = 180^{o} $<\/td><td>V\u00ec $\\widehat{O_{3}} $ v\u00e0 $\\widehat{O_{2}}$ k\u1ec1 b\u00f9 <\/td><\/tr><tr><td>3<\/td><td>$\\widehat{O_{1}} + \\widehat{O_{2}} = \\widehat{O_{3}} + \\widehat{O_{2}} $<\/td><td>C\u0103n c\u1ee9 v\u00e0o 1 v\u00e0 2<\/td><\/tr><tr><td>4<\/td><td> $ \\widehat{O_{1}} = \\widehat{O_{3}}$<\/td><td>C\u0103n c\u1ee9 v\u00e0o 3<\/td><\/tr><\/table> B\u00ecnh: <table><tr><th><\/th><th>C\u00e1c kh\u1eb3ng \u0111\u1ecbnh<\/th><th>C\u0103n c\u1ee9 c\u1ee7a kh\u1eb3ng \u0111\u1ecbnh<\/th><\/tr><tr><td>1<\/td><td>$\\widehat{O_{1}} $ v\u00e0 $\\widehat{O_{2}}$ k\u1ec1 b\u00f9<\/td><td> V\u00ec $\\widehat{O_{1}} + \\widehat{O_{2}} = 180^{o} $<\/td><\/tr><tr><td>2<\/td><td>$\\widehat{O_{3}} $ v\u00e0 $\\widehat{O_{2}}$ k\u1ec1 b\u00f9<\/td><td>V\u00ec $\\widehat{O_{3}} + \\widehat{O_{2}} = 180^{o} $<\/td><\/tr><tr><td>3<\/td><td>$\\widehat{O_{1}} + \\widehat{O_{2}} = \\widehat{O_{3}} + \\widehat{O_{2}} $<\/td><td>C\u0103n c\u1ee9 v\u00e0o 1 v\u00e0 2<\/td><\/tr><tr><td>4<\/td><td> $ \\widehat{O_{1}} = \\widehat{O_{3}}$<\/td><td>C\u0103n c\u1ee9 v\u00e0o 3<\/td><\/tr><\/table> ","select":["A. Ch\u1ec9 c\u00f3 An \u0111\u00fang ","B. Ch\u1ec9 c\u00f3 B\u00ecnh \u0111\u00fang ","C. C\u1ea3 2 b\u1ea1n \u0111\u1ec1u \u0111\u00fang","D. C\u1ea3 2 b\u1ea1n \u0111\u1ec1u sai"],"hint":"","explain":" Ch\u1ec9 c\u00f3 An l\u00e0m \u0111\u00fang. <br\/> <br\/> <span class='basic_pink'>\u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 B. <\/span> ","column":2}]}],"id_ques":1508},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":10,"ques":" Cho \u0111\u1ecbnh l\u00fd ''N\u1ebfu m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng vu\u00f4ng g\u00f3c v\u1edbi m\u1ed9t trong hai \u0111\u01b0\u1eddng th\u1eb3ng song song th\u00ec n\u00f3 vu\u00f4ng g\u00f3c v\u1edbi \u0111\u01b0\u1eddng th\u1eb3ng kia.'' <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop7/toan/hinhhoc/bai6/lv3/img\/H7C16-30C.png' \/><\/center> Gi\u1ea3 thi\u1ebft v\u00e0 K\u1ebft lu\u1eadn c\u1ee7a \u0111\u1ecbnh l\u00fd n\u00e0y l\u00e0: <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop7/toan/hinhhoc/bai6/lv3/img\/H7C16-30A.png' \/><img src='https://www.luyenthi123.com/file/luyenthi123/lop7/toan/hinhhoc/bai6/lv3/img\/H7C16-30B.png' \/><\/center> ","select":["A ","B ","C","D"],"hint":"","explain":" \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 C. ","column":4}]}],"id_ques":1509},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":10,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop7/toan/hinhhoc/bai6/lv3/img\/H7C16-35A.png' \/><\/center> Vi\u1ebft k\u1ebft lu\u1eadn cho \u0111\u1ecbnh l\u00fd sau: <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop7/toan/hinhhoc/bai6/lv3/img\/H7C16-35B.png' \/><\/center> ","select":["A. $\\widehat{O_{1}} = \\widehat{O_{4}}$ ","B. $\\widehat{MON} $ l\u00e0 g\u00f3c nh\u1ecdn ","C. $ OM \\perp ON $ ","D. OB l\u00e0 ph\u00e2n gi\u00e1c c\u1ee7a g\u00f3c $\\widehat{MON} $ "],"hint":"","explain":" Ta c\u00f3 \u0111\u1ecbnh l\u00fd l\u00e0: <br\/> ''Hai tia ph\u00e2n gi\u00e1c c\u1ee7a hai g\u00f3c k\u1ec1 b\u00f9 t\u1ea1o th\u00e0nh m\u1ed9t g\u00f3c vu\u00f4ng.'' <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop7/toan/hinhhoc/bai6/lv3/img\/H7C16-35C.png' \/><\/center> <br\/> <span class='basic_pink'>\u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 C. <\/span>","column":2}]}],"id_ques":1510}],"lesson":{"save":0,"level":3}}