{"common":{"save":0,"post_id":"7996","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"11788","post_id":"7996","mon_id":"1159278","chapter_id":"1159334","question":"<p>Khi quay m\u1ed9t tam giác vuông (k\u1ec3 c\u1ea3 các \u0111i\u1ec3m trong tam giác vuông \u0111ó) quanh \u0111\u01b0\u1eddng th\u1eb3ng ch\u1ee9a m\u1ed9t c\u1ea1nh góc vuông ta \u0111\u01b0\u1ee3c:<\/p>","options":["<strong>A.<\/strong> Hình nón. ","<strong>B.<\/strong> Kh\u1ed1i tr\u1ee5.","<strong>C.<\/strong> Kh\u1ed1i nón.","<strong>D.<\/strong> Hình tr\u1ee5."],"correct":"3","level":"1","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>C.<\/strong> Kh\u1ed1i nón.<\/span><\/p><p>Xoay 1 tam giác vuông (k\u1ec3 c\u1ea3 các \u0111i\u1ec3m trong tam giác vuông \u0111ó) quanh \u0111\u01b0\u1eddng th\u1eb3ng ch\u1ee9a m\u1ed9t c\u1ea1nh góc vuông ta \u0111\u01b0\u1ee3c m\u1ed9t kh\u1ed1i nón.<\/p><p><span class=\"svgedit\"><svg height=\"180\" width=\"180\"> <g><title><\/title><rect fill=\"#d4ffaa\" height=\"182\" id=\"canvas_background\" width=\"182\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_2\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g><title><\/title><ellipse cx=\"89.5\" cy=\"157.78725\" fill=\"#aaff56\" id=\"svg_1\" rx=\"86.5\" ry=\"16.86275\" stroke=\"#000\" stroke-width=\"1.5\"><\/ellipse> 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fill-opacity=\"null\" id=\"svg_24\" rx=\"16.63462\" ry=\"4.49673\" stroke=\"#bf0000\" stroke-width=\"1.5\"><\/ellipse> <ellipse cx=\"89.5\" cy=\"86.96372\" fill=\"#d4ffaa\" id=\"svg_25\" rx=\"9.14904\" ry=\"3.37255\" stroke-width=\"1.5\"><\/ellipse> <text fill=\"#bf0000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"17\" id=\"svg_26\" stroke=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"matrix(0.8141846642937637,-0.2296932733956908,0.16993938334606296,1.1004673372821134,-12.32680840036043,23.589388448521802) \" x=\"90.31546\" xml:space=\"preserve\" y=\"84.50678\">><\/text> <rect fill=\"none\" height=\"11.24183\" id=\"svg_28\" stroke=\"#000000\" stroke-width=\"1.5\" width=\"8.31731\" x=\"87.83653\" y=\"146.54542\"><\/rect> <\/g> <\/svg><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2025-05-31 08:22:02","option_type":"txt","len":2},{"id":"11790","post_id":"7996","mon_id":"1159278","chapter_id":"1159334","question":"<p>\u0110áy c\u1ee7a hình tr\u1ee5 là gì?<\/p>","options":["<strong>A.<\/strong> Hình vuông.","<strong>B.<\/strong> Hình ch\u1eef nh\u1eadt.","<strong>C.<\/strong> Hình tròn.","<strong>D.<\/strong> Hình tam giác."],"correct":"3","level":"1","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>C.<\/strong> Hình tròn.<\/span><\/p><p>\u0110áy c\u1ee7a hình tr\u1ee5 là hình tròn.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2025-05-31 08:23:00","option_type":"txt","len":2},{"id":"11791","post_id":"7996","mon_id":"1159278","chapter_id":"1159334","question":"<p>K\u1ebft lu\u1eadn nào sau \u0111ây <strong>sai<\/strong>?<\/p>","options":["<strong>A.<\/strong> Trong hình nón, m\u1ecdi \u0111\u01b0\u1eddng sinh b\u1eb1ng nhau.","<strong>B.<\/strong> Trong hình nón, \u0111\u01b0\u1eddng cao vuông góc v\u1edbi bán kính \u0111\u01b0\u1eddng tròn \u0111áy.","<strong>C.<\/strong> Trong hình nón, ch\u1ec9 có m\u1ed9t \u0111\u01b0\u1eddng tròn \u0111áy.","<strong>D.<\/strong> Trong hình nón có vô s\u1ed1 \u0111\u1ec9nh."],"correct":"4","level":"1","hint":"","answer":"<p>K\u1ebft lu\u1eadn sai là <span style=\"color:#16a085;\"><strong>D.<\/strong> Trong hình nón có vô s\u1ed1 \u0111\u1ec9nh.<\/span><\/p><p>Hình nón có duy nh\u1ea5t m\u1ed9t \u0111\u1ec9nh.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2025-05-31 08:24:18","option_type":"txt","len":3}]}