{"common":{"save":0,"post_id":"991","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"1661","post_id":"991","mon_id":"0","chapter_id":"0","question":"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","options":{"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":"Cho h\u00ecnh v\u1ebd d\u01b0\u1edbi \u0111\u00e2y. Bi\u1ebft r\u1eb1ng C l\u00e0 trung \u0111i\u1ec3m c\u1ee7a $AD$ v\u00e0 $\\widehat{A} = \\widehat{D}$ <br\/> H\u00e3y s\u1eafp x\u1ebfp c\u00e1c \u00fd ch\u1ee9ng minh $BC = EC$ ","audio":"","temp":"matching","correct":[["2","4","5","1","3"]],"list":[{"point":10,"ques":"","image":"img\/H7B12-35.png","left":["C l\u00e0 trung \u0111i\u1ec3m c\u1ee7a AD v\u00e0 $\\widehat{A} = \\widehat{D}$ ","$AC = CD$","$\\widehat{ACB} = \\widehat{DCE} $","$\\triangle ABC = \\triangle DEC $","$BC = EC$"],"right":["theo tr\u01b0\u1eddng h\u1ee3p g\u00f3c-c\u1ea1nh-g\u00f3c","gi\u1ea3 thi\u1ebft","\u0111i\u1ec1u ph\u1ea3i ch\u1ee9ng minh","\u0111\u1ecbnh ngh\u0129a trung \u0111i\u1ec3m","g\u00f3c \u0111\u1ed1i \u0111\u1ec9nh"],"top":100,"explain":"<span class='basic_left'> Ta c\u00f3: <br\/> C l\u00e0 trung \u0111i\u1ec3m c\u1ee7a AD v\u00e0 $\\widehat{A} = \\widehat{D}$ (gi\u1ea3 thi\u1ebft) <br\/> $AC = CD$ (\u0111\u1ecbnh ngh\u0129a trung \u0111i\u1ec3m) <br\/> $\\widehat{ACB} = \\widehat{DCE} $ (g\u00f3c \u0111\u1ed1i \u0111\u1ec9nh) <br\/> $\\Rightarrow$ $\\triangle ABC = \\triangle DEC $ <br\/> $\\Rightarrow$ BC = EC <\/span> "}]}]},"correct":"","level":"3","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:23:02"},{"id":"1662","post_id":"991","mon_id":"0","chapter_id":"0","question":"L\u1ef1a ch\u1ecdn \u0111\u00fang hay sai","options":{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00fang hay sai","title_trans":"","temp":"true_false","correct":[["t","t","t","f"]],"list":[{"point":10,"image":"","col_name":["","\u0110\u00fang","Sai"],"arr_ques":["N\u1ebfu hai tam gi\u00e1c b\u1eb1ng nhau th\u00ec m\u1ed9t c\u1ea1nh v\u00e0 hai g\u00f3c k\u1ec1 c\u1ee7a tam gi\u00e1c n\u00e0y b\u1eb1ng m\u1ed9t c\u1ea1nh v\u00e0 hai g\u00f3c k\u1ec1 c\u1ee7a tam gi\u00e1c kia. ","N\u1ebfu m\u1ed9t c\u1ea1nh v\u00e0 hai g\u00f3c k\u1ec1 c\u1ee7a tam gi\u00e1c n\u00e0y b\u1eb1ng m\u1ed9t c\u1ea1nh v\u00e0 hai g\u00f3c k\u1ec1 c\u1ee7a tam gi\u00e1c kia th\u00ec hai tam gi\u00e1c \u0111\u00f3 b\u1eb1ng nhau. ","N\u1ebfu m\u1ed9t c\u1ea1nh v\u00e0 hai g\u00f3c k\u1ec1 c\u1ee7a tam gi\u00e1c n\u00e0y b\u1eb1ng m\u1ed9t c\u1ea1nh v\u00e0 hai g\u00f3c k\u1ec1 c\u1ee7a tam gi\u00e1c kia th\u00ec c\u1eb7p g\u00f3c c\u00f2n l\u1ea1i c\u0169ng b\u1eb1ng nhau.","N\u1ebfu m\u1ed9t c\u1ea1nh v\u00e0 hai g\u00f3c c\u1ee7a tam gi\u00e1c n\u00e0y b\u1eb1ng m\u1ed9t c\u1ea1nh v\u00e0 hai g\u00f3c c\u1ee7a tam gi\u00e1c kia th\u00ec hai tam gi\u00e1c \u0111\u00f3 b\u1eb1ng nhau. "],"explain":[" <span class='basic_left'>1 - \u0110\u00fang, do \u0111\u1ecbnh ngh\u0129a hai tam gi\u00e1c b\u1eb1ng nhau. <\/span>","<span class='basic_left'>2 - \u0110\u00fang, do g\u00f3c-c\u1ea1nh-g\u00f3c <\/span>","<span class='basic_left'>3 - \u0110\u00fang do g\u00f3c-c\u1ea1nh-g\u00f3c v\u00e0 \u0111\u1ecbnh ngh\u0129a hai tam gi\u00e1c b\u1eb1ng nhau. <\/span>"," <center><img src='img\/H7B12-39.png' \/><\/center> <br\/> <span class='basic_left'>4 - Sai, v\u00ed d\u1ee5 X\u00e9t $\\triangle ABC $ c\u00f3 $AC > AB$, <br\/> Tr\u00ean $AC$ l\u1ea5y $A'C' = AB$ <br\/> V\u1ebd $A'B' \/\/ AB, B'C' \/\/ BC$ th\u00ec hai tam gi\u00e1c $ABC$ v\u00e0 $A'B'C'$ c\u00f3: <br\/> + $AB = A'C'$ <br\/> + $\\widehat{A} = \\widehat{A'}$ <br\/> + $ \\widehat{C} = \\widehat{C'} $ <br\/> Nh\u01b0ng hai tam gi\u00e1c kh\u00f4ng b\u1eb1ng nhau. <\/span> "]}]}]},"correct":"","level":"3","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:23:02"},{"id":"1663","post_id":"991","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 $ABC$ (AB $\\neq$ AC), tia $Ax$ \u0111i qua trung \u0111i\u1ec3m M c\u1ee7a $BC$. <br\/> K\u1ebb $BE$ v\u00e0 $CF$ vu\u00f4ng g\u00f3c v\u1edbi $Ax (E \\in Ax, F \\in Ax)$. Khi \u0111\u00f3: ","select":["$BE < CF$ ","$BE = CF$ ","$BE > CF$ "],"explain":"<center><img src='img\/H7B12-40.png' \/><\/center> <span class='basic_left'> Theo gi\u1ea3 thi\u1ebft $ BE \\perp Ax, CF \\perp Ax$ <br\/> Suy ra $BE \/\/ CF$ (v\u00ec c\u00f9ng vu\u00f4ng g\u00f3c v\u1edbi \u0111\u01b0\u1eddng th\u1eb3ng th\u1ee9 ba) <br\/> T\u1eeb \u0111\u00f3 $\\widehat{B_{1}} = \\widehat{C_{2}} $ (so le trong) (1) <br\/>M\u1eb7t kh\u00e1c c\u00f3: $MB = MC$ (gi\u1ea3 thi\u1ebft) (2) <br\/> $\\qquad \\widehat{BME} = \\widehat{CMF} $ (\u0111\u1ed1i \u0111\u1ec9nh) (3) <br\/> T\u1eeb (1), (2) v\u00e0 (3), ta c\u00f3: $\\triangle BME = \\triangle CMF (g.c.g) $ <br\/> Suy ra: $BE = CF$ <\/span> ","column":3}]}]},"correct":"","level":"3","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:23:02"}]}