{"common":{"save":0,"post_id":"7139","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"5648","post_id":"7139","mon_id":"1158924","chapter_id":"1159174","question":"<p>L\u0103ng tr\u1ee5 tam gi&aacute;c \u0111\u1ec1u c&oacute; \u0111\u1ed9 d&agrave;i t\u1ea5t c\u1ea3 c&aacute;c c\u1ea1nh b\u1eb1ng 3. Th\u1ec3 t&iacute;ch kh\u1ed1i l\u0103ng tr\u1ee5 \u0111&atilde; cho b\u1eb1ng:<\/p>","options":["<strong>A. <\/strong><span class=\"math-tex\">$\\dfrac{27\\sqrt{3}}{4}$<\/span>","<strong>B. <\/strong><span class=\"math-tex\">$\\dfrac{9\\sqrt{3}}{2}$<\/span>","<strong>C. <\/strong><span class=\"math-tex\">$\\dfrac{9\\sqrt{3}}{4}$<\/span>","<strong>D. <\/strong><span class=\"math-tex\">$\\dfrac{27\\sqrt{3}}{2}$<\/span>"],"correct":"1","level":"2","hint":"","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>A.&nbsp;<\/strong><span class=\"math-tex\">$\\dfrac{27\\sqrt{3}}{4}$<\/span><\/span><\/p><p>\u0110&aacute;y l&agrave; l\u0103ng tr\u1ee5 l&agrave; tam gi&aacute;c \u0111\u1ec1u b\u1eb1ng 3 n&ecirc;n di\u1ec7n t&iacute;ch \u0111&aacute;y l&agrave;&nbsp;<span class=\"math-tex\">$S=\\dfrac{1}{2}.3^2.\\dfrac{\\sqrt{3}}{2}=\\dfrac{9\\sqrt{3}}{4}$<\/span>&nbsp;(\u0111\u01a1n v\u1ecb di\u1ec7n t&iacute;ch)<\/p><p>Chi\u1ec1u cao l\u0103ng tr\u1ee5 l&agrave; h = 3.<\/p><p>V\u1eady th\u1ec3 t&iacute;ch l\u0103ng tr\u1ee5 l&agrave;:&nbsp;<span class=\"math-tex\">$V=S.h=\\dfrac{9\\sqrt{3}}{4}.3=\\dfrac{27\\sqrt{3}}{4}$<\/span>&nbsp;(\u0111\u01a1n v\u1ecb th\u1ec3 t&iacute;ch)<\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2024-05-08 02:47:22","option_type":"math","len":0},{"id":"5650","post_id":"7139","mon_id":"1158924","chapter_id":"1159174","question":"<p>Cho h&igrave;nh l\u0103ng tr\u1ee5 \u0111\u1ee9ng ABC.A&#39;B&#39;C&#39;&nbsp;c&oacute; \u0111&aacute;y l&agrave; tam gi&aacute;c vu&ocirc;ng c&acirc;n t\u1ea1i B, AB = a&nbsp;v&agrave; A&#39;B&nbsp;= a<span class=\"math-tex\">$\\sqrt{3}$<\/span>. Th\u1ec3 t&iacute;ch kh\u1ed1i l\u0103ng tr\u1ee5 ABC.A&#39;B&#39;C&#39;&nbsp;l&agrave;:<\/p>","options":["<strong>A. <\/strong><span class=\"math-tex\">$\\dfrac{a^3\\sqrt{3}}{2}$<\/span>","<strong>B. <\/strong><span class=\"math-tex\">$\\dfrac{a^3}{6}$<\/span>","<strong>C. <\/strong><span class=\"math-tex\">$\\dfrac{a^3}{2}$<\/span>","<strong>D. <\/strong><span class=\"math-tex\">$\\dfrac{a^3\\sqrt{2}}{2}$<\/span>"],"correct":"4","level":"2","hint":"","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>D.&nbsp;<\/strong><span class=\"math-tex\">$\\dfrac{a^3\\sqrt{2}}{2}$<\/span><\/span><\/p><p>Chi\u1ec1u cao l\u0103ng tr\u1ee5 l&agrave;&nbsp;<span class=\"math-tex\">$AA^\\prime=\\sqrt{A^\\prime B^2-AB^2}=a\\sqrt{2}$<\/span>&nbsp;(\u0111\u01a1n v\u1ecb \u0111\u1ed9 d&agrave;i)<\/p><p>Di\u1ec7n t&iacute;ch \u0111&aacute;y l&agrave;&nbsp;<span class=\"math-tex\">$S_{ABC}=\\dfrac{1}{2}AB^2=\\dfrac{a^2}{2}$<\/span>&nbsp;(\u0111\u01a1n v\u1ecb di\u1ec7n t&iacute;ch)<\/p><p>Th\u1ec3 t&iacute;ch kh\u1ed1i l\u0103ng tr\u1ee5 l&agrave;&nbsp;<span class=\"math-tex\">$V=S_{ABC}.AA^\\prime=\\dfrac{a^3\\sqrt{2}}{2}$<\/span>&nbsp;(\u0111\u01a1n v\u1ecb th\u1ec3 t&iacute;ch)<\/p><p><span class=\"svgedit\"><svg height=\"258\" width=\"213\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\"> <g> &lt;title&gt;&lt;\/title&gt; <rect fill=\"#fff\" height=\"260\" id=\"canvas_background\" width=\"215\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" height=\"100%\" id=\"canvasGrid\" overflow=\"visible\" width=\"100%\" x=\"0\" y=\"0\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g> &lt;title&gt;&lt;\/title&gt; <image height=\"258\" id=\"svg_1\" width=\"213\" x=\"1.5\" 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\" y=\"2\"><\/image> <\/g> <\/svg><\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2024-05-08 02:55:09","option_type":"math","len":0},{"id":"5652","post_id":"7139","mon_id":"1158924","chapter_id":"1159174","question":"<p>M\u1ed9t kh\u1ed1i ch&oacute;p c&oacute; di\u1ec7n t&iacute;ch \u0111&aacute;y b\u1eb1ng 24dm&sup2; v&agrave; chi\u1ec1u cao b\u1eb1ng 200cm. Th\u1ec3 t&iacute;ch c\u1ee7a kh\u1ed1i ch&oacute;p \u0111&atilde; cho b\u1eb1ng<\/p>","options":["<strong>A. <\/strong>160dm&sup3;","<strong>B. <\/strong>1600dm&sup3;","<strong>C. <\/strong>160cm&sup3;","<strong>D. <\/strong>480dm&sup3;"],"correct":"1","level":"2","hint":"","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>A. <\/strong>160dm&sup3;<\/span><\/p><p>\u0110\u1ed5i: 200cm = 20dm<\/p><p>Th\u1ec3 t&iacute;ch c\u1ee7a kh\u1ed1i ch&oacute;p \u0111&atilde; cho l&agrave;:<\/p><p><span class=\"math-tex\">$V=\\dfrac{1}{3}Bh=\\dfrac{1}{3}.24.20=160$<\/span>&nbsp;(dm&sup3;)<\/p>","type":"choose","extra_type":"shape2","user_id":"131","test":"0","date":"2024-05-09 01:25:26","option_type":"txt","len":0}]}