{"common":{"save":0,"post_id":"1023","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"1531","post_id":"1023","mon_id":"0","chapter_id":"0","question":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","options":{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":10,"ques":"Cho hai \u0111\u01b0\u1eddng th\u1eb3ng a, b song song. \u0110i\u1ec3m A $\\in$ a, B $\\in$ b, C $\\in$ b. <br\/> Bi\u1ebft $\\widehat{BAa} = 40^{o}, \\widehat{ACB} = 30^{o} $ nh\u01b0 h\u00ecnh v\u1ebd. <br\/> C\u00e2u n\u00e0o sau \u0111\u00e2y \u0111\u00fang? <center><img src='img\/H7C14-45.png' \/><\/center> ","select":["A. $\\widehat{A_{2}} < \\widehat{B} $","B. $\\widehat{A_{3}} < \\widehat{A_{2}} $","C. $\\widehat{A_{3}} > \\widehat{B} $","D. $\\widehat{A_{3}} = \\widehat{B} $ "],"hint":"","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> N\u1ebfu \u0111\u01b0\u1eddng th\u1eb3ng c c\u1eaft hai \u0111\u01b0\u1eddng th\u1eb3ng song song a v\u00e0 b th\u00ec t\u1ea1o th\u00e0nh c\u00e1c c\u1eb7p g\u00f3c so le trong b\u1eb1ng nhau, c\u1eb7p g\u00f3c \u0111\u1ed3ng v\u1ecb b\u1eb1ng nhau, c\u1eb7p g\u00f3c trong c\u00f9ng ph\u00eda, ngo\u00e0i c\u00f9ng ph\u00eda b\u00f9 nhau. <\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> V\u00ec a \/\/ b n\u00ean $ \\widehat{A_{3}} = \\widehat{C} = 30^{o} $ (hai g\u00f3c so le trong) <br\/> C\u00f3 $\\widehat{A_{1}} + \\widehat{A_{2}} + \\widehat{A_{3}} = 180^{o} $<br\/> $ \\Rightarrow \\widehat{A_{2}} $$= 180^{o} - \\widehat{A_{1}} - \\widehat{A_{3}} \\\\ = 180^{o} - 40^{o} - 30^{o} \\\\ = 110^{o} $ <br\/> a \/\/ b n\u00ean $ \\widehat{A_{1}} = \\widehat{B} = 40^{o} $ (hai g\u00f3c so le trong) <br\/> V\u1eady $ \\widehat{A_{2}} > \\widehat{B} \\\\ \\widehat{A_{3}} < \\widehat{A_{2}} \\\\ \\widehat{A_{3}} < \\widehat{B} $ <br\/> <br\/><span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 B. <\/span>","column":2}]}]},"correct":"","level":"3","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:23:00"},{"id":"1532","post_id":"1023","mon_id":"0","chapter_id":"0","question":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","options":{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":10,"ques":"Cho tam gi\u00e1c ABC. V\u1ebd $AH \\perp BC (H \\in BC) $. <br\/> Cho bi\u1ebft $\\widehat{ACB} = 30^{o} $. V\u1ebd tia $Ax \\perp AH$. <br\/> Ph\u00e1t bi\u1ec3u n\u00e0o sau \u0111\u00e2y \u0111\u00fang? ","select":["A. Ax, BC song song v\u1edbi nhau v\u00e0 $\\widehat{BAC} =90^{o} $ ","B. $\\widehat{HAC} = 60^{o} $ l\u00e0 g\u00f3c ph\u1ee5 v\u1edbi $\\widehat{CAx} $ ","C. $\\widehat{CAx} = 30^{o} $ l\u00e0 g\u00f3c \u0111\u1ed3ng v\u1ecb v\u1edbi $\\widehat{ACB} $ ","D. $\\widehat{HAC} = 60^{o} $ l\u00e0 g\u00f3c k\u1ec1 b\u00f9 v\u1edbi $\\widehat{CAx} $ "],"hint":"","explain":" <center><img src='img\/H7C17-46.png' \/><\/center> Tam gi\u00e1c ABC, $AH \\perp BC (H \\in BC) $, $\\widehat{ACB} = 30^{o} $ <br\/> Khi \u0111\u00f3 $\\widehat{HAC} = 60^{o} $ l\u00e0 g\u00f3c ph\u1ee5 v\u1edbi $\\widehat{CAx} $ <br\/> <br\/> <span class='basic_pink'>\u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 B. <\/span> ","column":2}]}]},"correct":"","level":"3","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:23:00"},{"id":"1533","post_id":"1023","mon_id":"0","chapter_id":"0","question":"S\u1eafp x\u1ebfp c\u00e1c c\u00e2u","options":{"time":24,"part":[{"time":3,"title":"S\u1eafp x\u1ebfp c\u00e1c c\u00e2u","title_trans":"Tr\u00ean H\u00ecnh 17, cho bi\u1ebft Ax \/\/ Cy. <br\/> H\u00e3y s\u1eafp x\u1ebfp c\u00e1c \u00fd ch\u1ee9ng minh $\\widehat{A} + \\widehat{B} + \\widehat{C} = 360^{o} $","temp":"sequence","correct":[[[1],[4],[5],[3],[2]]],"list":[{"point":10,"image":"img\/H7C17-17A.png","left":["K\u1ebb tia Bz \/\/ Ax th\u00ec Bz \/\/ Cy","V\u1eady $\\widehat{A} + \\widehat{ABz} + \\widehat{zBC} + \\widehat{C} = 360^{o} $","Hay $\\widehat{A} + \\widehat{B} + \\widehat{C} = 360^{o} $","V\u00e0 $\\widehat{C} + \\widehat{zBC} = 180^{o} $","Do \u0111\u00f3 $\\widehat{A} + \\widehat{ABz} = 180^{o} $ "],"top":55,"hint":"","explain":"<center><img src='img\/H7C17-17B.png' \/><\/center> K\u1ebb tia Bz \/\/ Ax th\u00ec Bz \/\/ Cy <br\/> Do \u0111\u00f3 $\\widehat{A} + \\widehat{ABz} = 180^{o} $ (hai g\u00f3c trong c\u00f9ng ph\u00eda) <br\/> V\u00e0 $\\widehat{C} + \\widehat{zBC} = 180^{o} $ (hai g\u00f3c trong c\u00f9ng ph\u00eda) <br\/> V\u1eady $\\widehat{A} + \\widehat{ABz} + \\widehat{zBC} + \\widehat{C} = 180^{o} + 180^{o} = 360^{o} $ <br\/> hay $\\widehat{A} + \\widehat{B} + \\widehat{C} = 360^{o} $ "}]}]},"correct":"","level":"3","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:23:00"}]}