如右图,一个空间几何体的主视图和左视图都是边长为1的正三角形,俯视图是一个圆,那么这个几何体的体积为__________ .
![](https://img.xkw.com/dksih/QBM/2011/4/7/1570109677051904/1570109682212864/STEM/4beea70338f0426c9470fad01966e801.png?resizew=118)
2011·广东·一模 查看更多[1]
(已下线)2011届广东省高三高考全真模拟试卷数学理卷一
更新时间:2016-11-30 17:39:14
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【推荐1】某几何体的三视图如图所示(单位:
),则该几何体的体积是__________
,表面积是__________
.
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【推荐2】已知正三棱柱
的正(主)视图和侧(左)视图如图所示. 设
的中心分别是
,现将此三棱柱绕直线
旋转,射线
旋转所成的角为
弧度(
可以取到任意一个实数),对应的俯视图的面积为
,则函数
的最大值为__________ ;最小正周期为__________ .
说明:“三棱柱绕直线
旋转”包括逆时针方向和顺时针方向,逆时针方向旋转时,
旋转所成的角为正角,顺时针方向旋转时,
旋转所成的角为负角.
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说明:“三棱柱绕直线
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【推荐1】如图,在梯形
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【推荐2】已知圆柱
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【推荐3】某几何体的三视图如图所示,记该几何体的体积为
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