{"common":{"save":0,"post_id":"1336","level":1,"total":20,"point":5,"point_extra":0},"segment":[{"id":"1831","post_id":"1336","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":[[3]],"list":[{"point":5,"ques":"T\u1eeb m\u1ed9t \u0111i\u1ec3m $A$ kh\u00f4ng n\u1eb1m tr\u00ean \u0111\u01b0\u1eddng th\u1eb3ng $d$, k\u1ebb \u0111\u01b0\u1eddng vu\u00f4ng g\u00f3c $AH$ v\u00e0 m\u1ed9t \u0111\u01b0\u1eddng xi\u00ean $AB$ t\u00f9y \u00fd \u0111\u1ebfn \u0111\u01b0\u1eddng th\u1eb3ng $d$. Kh\u1eb3ng \u0111\u1ecbnh n\u00e0o sau \u0111\u00e2y \u0111\u00fang? ","select":["A. $AH > AB$ ","B. $AH = AB$","C. $AH < AB$"],"hint":"D\u1ef1a v\u00e0o quan h\u1ec7 gi\u1eefa \u0111\u01b0\u1eddng vu\u00f4ng g\u00f3c v\u00e0 \u0111\u01b0\u1eddng xi\u00ean","explain":" <center><img src='img\/H7C3B18_D01.png' \/><\/center> <br\/> Ta c\u00f3 $AH$ l\u00e0 \u0111\u01b0\u1eddng vu\u00f4ng g\u00f3c, $AB$ l\u00e0 \u0111\u01b0\u1eddng xi\u00ean <br\/> N\u00ean $AH < AB$ (quan h\u1ec7 gi\u1eefa \u0111\u01b0\u1eddng vu\u00f4ng g\u00f3c v\u00e0 \u0111\u01b0\u1eddng xi\u00ean) <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: C <\/span> <br\/> <span class='basic_green'> <i>Nh\u1eadn x\u00e9t: Ngo\u00e0i c\u00e1ch tr\u00ean ta c\u00f3 th\u1ec3 l\u00e0m theo c\u00e1ch sau: <br\/> X\u00e9t $\\triangle{ABH}$ c\u00f3 $\\widehat{H} = 90^{o}$ (gt) <br\/> $\\Rightarrow$ $AB$ l\u00e0 c\u1ea1nh l\u1edbn nh\u1ea5t (trong tam gi\u00e1c vu\u00f4ng c\u1ea1nh huy\u1ec1n l\u00e0 c\u1ea1nh l\u1edbn nh\u1ea5t) <br\/> $\\Rightarrow$ $AB > AH$ <\/span> ","column":3}]}]},"correct":"","level":"1","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:23:04"},{"id":"1832","post_id":"1336","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":[[1]],"list":[{"point":5,"ques":"Cho h\u00ecnh v\u1ebd: <br\/> <center><img src='img\/H7C3B18_D02.png' \/><\/center><br\/> Kh\u1eb3ng \u0111\u1ecbnh n\u00e0o sau \u0111\u00e2y \u0111\u00fang? ","select":["A. $AH < AN < AP$ ","B. $AH < AP < AM$","C. $AN < AP < AM$","D. $AM > AN > AP$"],"hint":"","explain":" <center><img src='img\/H7C3B18_D02.png' \/><\/center> <br\/> Quan s\u00e1t h\u00ecnh v\u1ebd ta th\u1ea5y: $HM < HN < HP$ <br\/> N\u00ean $ AM < AN < AP$ (\u0111\u01b0\u1eddng xi\u00ean n\u00e0o c\u00f3 h\u00ecnh chi\u1ebfu l\u1edbn h\u01a1n th\u00ec l\u1edbn h\u01a1n) <br\/> M\u00e0 $AH$ l\u00e0 \u0111\u01b0\u1eddng vu\u00f4ng g\u00f3c n\u00ean: $AH < AM < AN < AP$ (\u0111\u01b0\u1eddng vu\u00f4ng g\u00f3c l\u00e0 \u0111\u01b0\u1eddng ng\u1eafn nh\u1ea5t) <br\/> $\\Rightarrow$ $AH < AM < AN < AP$ <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: A <\/span> ","column":2}]}]},"correct":"","level":"1","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:23:04"},{"id":"1833","post_id":"1336","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":[[3]],"list":[{"point":5,"ques":"Cho h\u00ecnh v\u1ebd: <br\/> <center><img src='img\/H7C3B18_D03.png' \/><\/center><br\/> Kh\u1eb3ng \u0111\u1ecbnh n\u00e0o sau \u0111\u00e2y \u0111\u00fang? ","select":["A. $AB = AC$ ","B. $AB > AC$","C. $AB < AC$"],"hint":"","explain":" <center><img src='img\/H7C3B18_D03.png' \/><\/center> <br\/>$\\triangle{ABC}$ c\u00f3: $BH = 2cm$; $HC = 4cm$ <br\/> $\\Rightarrow BH < HC$ $\\Rightarrow$ $AB < AC$ (\u0111\u01b0\u1eddng xi\u00ean n\u00e0o c\u00f3 h\u00ecnh chi\u1ebfu l\u1edbn h\u01a1n th\u00ec l\u1edbn h\u01a1n) <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: C <\/span> ","column":3}]}]},"correct":"","level":"1","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:23:04"}]}