{"common":{"save":0,"post_id":"9107","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"5109","post_id":"9107","mon_id":"1159414","chapter_id":"1159500","question":"<p>M\u1ed9t hình ch\u1eef nh\u1eadt có chi\u1ec1u dài là 15,5 cm, chi\u1ec1u r\u1ed9ng là 9,3 cm. Tính chu vi c\u1ee7a hình ch\u1eef nh\u1eadt \u0111ó.<\/p>","options":["<strong>A.<\/strong> 46,9 cm.","<strong>B.<\/strong> 49,6 cm.","<strong>C.<\/strong> 48,6 cm.","<strong>D.<\/strong> 46,8 cm."],"correct":"2","level":"1","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>B.<\/strong> 49,6 cm.<\/span><\/p><p>Chu vi c\u1ee7a hình ch\u1eef nh\u1eadt là:<\/p><p>(15,5 + 9,3) x 2 = 24,8 x 2 = 49,6 (cm).<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2025-04-30 14:45:06","option_type":"txt","len":1},{"id":"5111","post_id":"9107","mon_id":"1159414","chapter_id":"1159500","question":"<p>M\u1ed9t hình vuông có chu vi là 57 cm. \u0110\u1ed9 dài c\u1ea1nh c\u1ee7a hình vuông \u0111ó là:<\/p>","options":["<strong>A.<\/strong> 14,52 cm.","<strong>B.<\/strong> 14,5 cm.","<strong>C.<\/strong> 14,3 cm.","<strong>D.<\/strong> 14,25 cm."],"correct":"4","level":"1","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>D.<\/strong> 14,25 cm.<\/span><\/p><p>\u0110\u1ed9 dài c\u1ea1nh c\u1ee7a hình vuông \u0111ó là:<\/p><p>57 : 4 = 14,25 (cm).<\/p>","type":"choose","extra_type":"shape2","time":"0","user_id":"131","test":"0","date":"2025-04-30 14:47:14","option_type":"txt","len":0},{"id":"5113","post_id":"9107","mon_id":"1159414","chapter_id":"1159500","question":"<p>M\u1ed9t hình tam giác có \u0111\u1ed9 dài \u0111áy là 14 dm và chi\u1ec1u cao t\u01b0\u01a1ng \u1ee9ng là 10 dm. Di\u1ec7n tích c\u1ee7a hình tam giác \u0111ó là:<\/p>","options":["<strong>A.<\/strong> 75 dm².","<strong>B.<\/strong> 140 dm².","<strong>C.<\/strong> 70 dm².","<strong>D.<\/strong> 12 dm²."],"correct":"3","level":"1","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>C.<\/strong> 70 dm².<\/span><\/p><p>Di\u1ec7n tích c\u1ee7a hình tam giác \u0111ó là:<\/p><p><span class=\"math-tex\">$\\dfrac{14 \\times 10}{2}$<\/span> = 70 (dm²).<\/p>","type":"choose","extra_type":"shape1","time":"0","user_id":"131","test":"0","date":"2025-04-30 14:51:43","option_type":"txt","len":0}]}
