{"common":{"save":0,"post_id":"7933","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"8305","post_id":"7933","mon_id":"1159278","chapter_id":"1159329","question":"<p>\u0110\u1ed9 dài C c\u1ee7a \u0111\u01b0\u1eddng tròn (O ; R), \u0111\u01b0\u1eddng kính d = 2R là:<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$C=2\\pi d$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$C=\\pi d$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$C=\\pi dR$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$C=\\pi R$<\/span>"],"correct":"2","level":"1","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>B.<\/strong> <span class=\"math-tex\">$C=\\pi d$<\/span>.<\/span><\/p><p>\u0110\u1ed9 dài C c\u1ee7a \u0111\u01b0\u1eddng tròn (O ; R), \u0111\u01b0\u1eddng kính d = 2R là <span class=\"math-tex\">$C=\\pi d=2\\pi R$<\/span>.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2024-11-03 10:11:11","option_type":"math","len":0},{"id":"8308","post_id":"7933","mon_id":"1159278","chapter_id":"1159329","question":"<p>\u0110\u1ed9 dài <span class=\"math-tex\">$l$<\/span> c\u1ee7a cung n° trên \u0111\u01b0\u1eddng tròn (O ; R), \u0111\u01b0\u1eddng kính d = 2R là:<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$l=\\dfrac{\\pi Rn}{180}$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$l=\\dfrac{\\pi Rn}{360}$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$l=\\dfrac{2\\pi Rn}{180}$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$l=\\dfrac{\\pi dn}{180}$<\/span>"],"correct":"1","level":"1","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>A.<\/strong> <span class=\"math-tex\">$l=\\dfrac{\\pi Rn}{180}$<\/span>.<\/span><\/p><p>\u0110\u1ed9 dài <span class=\"math-tex\">$l$<\/span> c\u1ee7a cung n° trên \u0111\u01b0\u1eddng tròn (O ; R), \u0111\u01b0\u1eddng kính d = 2R là: <span class=\"math-tex\">$l=\\dfrac{\\pi Rn}{180}$<\/span>.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2024-11-03 10:14:39","option_type":"math","len":0},{"id":"8310","post_id":"7933","mon_id":"1159278","chapter_id":"1159329","question":"<p>T\u1ec9 s\u1ed1 gi\u1eefa \u0111\u1ed9 dài cung n° và \u0111\u1ed9 dài \u0111\u01b0\u1eddng tròn (cùng bán kính) \u0111úng b\u1eb1ng<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{n\\pi}{180}$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$\\dfrac{n\\pi}{360}$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$\\dfrac{n}{180}$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$\\dfrac{n}{360}$<\/span>"],"correct":"4","level":"1","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>D.<\/strong> <span class=\"math-tex\">$\\dfrac{n}{360}$<\/span>.<\/span><\/p><p>T\u1ec9 s\u1ed1 gi\u1eefa \u0111\u1ed9 dài cung n° và \u0111\u1ed9 dài \u0111\u01b0\u1eddng tròn (cùng bán kính) \u0111úng b\u1eb1ng <span class=\"math-tex\">$\\dfrac{n}{360}$<\/span>.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2024-11-04 01:29:58","option_type":"math","len":0}]}
