如图,三棱锥
的四个顶点都在球O的球面上,
是边长为6的正三角形,二面角
的大小为
,则点O到平面
的距离为_______ ,球O的表面积为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6694f162dd2040351330a73e81041f4.png)
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21-22高三上·湖南长沙·阶段练习 查看更多[5]
湖南师范大学附属中学2021-2022学年高三上学期第一次月考数学试题(已下线)考点30 组合体的“切”“接”综合问题-备战2022年高考数学典型试题解读与变式湖南师范大学附属中学2021-2022学年高二上学期12月第一次大练习数学试题(已下线)模块三 题型突破篇 小题满分挑战练(2) (北师大版)单元测试B卷——第八章?立体几何初步
更新时间:2021-09-15 20:34:25
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【推荐1】把底面半径为
的圆锥放倒在一平面上,使圆锥在此平面内绕圆锥顶点
滚动,当这个圆锥在平面内转回原位置时,圆锥本身滚动了2周,则圆锥的母线长为___________
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【推荐2】有一个球心为
,半径
的球,球内有半径
的截面圆,截面圆心为
,连接
并延长交球面于
点,以截面为底,
为顶点,可以做出一个圆锥,则圆锥的体积为___________ .
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【推荐1】已知棱长相等的正三棱锥
底面的三个顶点
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为
的中心),球面与棱
分别交于点
.若球
的表面积为
,则多面体
的体积为______ .
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【推荐2】矩形
中,
,
,沿
将矩形
折成一个大小为
的二面角
,则四面体
的外接球的表面积为__________ .
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【推荐1】如图,四边形
为平行四边形,
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,
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的内切球表面积为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
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【推荐2】已知直三棱柱
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【推荐1】二面角
的大小为
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到棱的距离都为2,且
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【推荐2】已知
为等腰直角三角形,
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为等边三角形,若二面角
为
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