{"common":{"save":0,"post_id":"6663","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"6798","post_id":"6663","mon_id":"1158921","chapter_id":"1158939","question":"<p>Cho <span class=\"math-tex\">$\\triangle ABC \\backsim \\triangle A^\\prime B^\\prime C^\\prime$<\/span> theo t\u1ec9 s\u1ed1 k thì <span class=\"math-tex\">$\\triangle A^\\prime B^\\prime C^\\prime \\backsim \\triangle ABC$<\/span> theo t\u1ec9 s\u1ed1 là<\/p>","options":["<strong>A.<\/strong> k","<strong>B.<\/strong> 1","<strong>C.<\/strong> –k","<strong>D.<\/strong> <span class=\"math-tex\">$\\dfrac{1}{k}$<\/span>"],"correct":"4","level":"1","hint":"","answer":"<p><span class=\"math-tex\">$\\triangle ABC \\backsim \\triangle A^\\prime B^\\prime C^\\prime$<\/span> theo t\u1ec9 s\u1ed1 k thì <span class=\"math-tex\">$\\triangle A^\\prime B^\\prime C^\\prime \\backsim \\triangle ABC$<\/span> theo t\u1ec9 s\u1ed1 là <span style=\"color:#16a085;\"><strong>D.<\/strong> <span class=\"math-tex\">$\\dfrac{1}{k}$<\/span>.<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-09-03 06:05:22","option_type":"math","len":0},{"id":"6799","post_id":"6663","mon_id":"1158921","chapter_id":"1158939","question":"<p>Hai tam giác b\u1eb1ng nhau thì \u0111\u1ed3ng d\u1ea1ng v\u1edbi nhau theo t\u1ec9 s\u1ed1 b\u1eb1ng<\/p>","options":["<strong>A.<\/strong> 0","<strong>B.<\/strong> 1","<strong>C.<\/strong> –1","<strong>D.<\/strong> 2"],"correct":"2","level":"1","hint":"","answer":"<p>Hai tam giác b\u1eb1ng nhau thì \u0111\u1ed3ng d\u1ea1ng v\u1edbi nhau theo t\u1ec9 s\u1ed1 b\u1eb1ng <span style=\"color:#16a085;\"><strong>B.<\/strong> 1.<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-09-03 06:06:50","option_type":"txt","len":1},{"id":"6801","post_id":"6663","mon_id":"1158921","chapter_id":"1158939","question":"<p>Cho \u25b3ABC<span class=\"math-tex\">$\\backsim$<\/span>\u25b3DEF theo t\u1ec9 s\u1ed1 k, bi\u1ebft AB = 5cm, DE = 2,5 cm. Tính t\u1ec9 s\u1ed1 \u0111\u1ed3ng d\u1ea1ng k.<\/p>","options":["<strong>A.<\/strong> 5","<strong>B.<\/strong> 2,5","<strong>C.<\/strong> 2","<strong>D.<\/strong> 2 cm"],"correct":"3","level":"1","hint":"","answer":"<p>Vì \u25b3ABC<span class=\"math-tex\">$\\backsim$<\/span>\u25b3DEF theo t\u1ec9 s\u1ed1 k nên k = <span class=\"math-tex\">$\\dfrac{AB}{DE}$<\/span> = <span class=\"math-tex\">$\\dfrac{5}{2,5}$<\/span> = 2.<\/p><p>V\u1eady t\u1ec9 s\u1ed1 \u0111\u1ed3ng d\u1ea1ng k là <span style=\"color:#16a085;\"><strong>C.<\/strong> 2.<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-09-03 06:09:40","option_type":"txt","len":0}]}
