四面体ABCD的体积为1,O为其中心,正四面体
与正四面体ABCD关于点O对称.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/16/af693efb-328c-4682-bb37-5d815f2addcb.png?resizew=220)
(1)证明:平面GHF
平面BCD:
(2)求三棱锥
的体积:
(3)设棱AB与棱
的交点为M,判断M的位置(不需要证明),并求出两个正四面体公共部分的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/16/af693efb-328c-4682-bb37-5d815f2addcb.png?resizew=220)
(1)证明:平面GHF
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ce657e1534daf6c5e163895549a47c2.png)
(3)设棱AB与棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
21-22高二上·上海奉贤·阶段练习 查看更多[4]
上海市奉贤中学2021-2022学年高二上学期10月月考数学试题(已下线)专题15 立体几何(讲义)-2(已下线)11.2锥体(作业)(夯实基础+能力提升)-【教材配套课件+作业】2022-2023学年高二数学精品教学课件(沪教版2020必修第三册)(已下线)第二章 立体几何中的计算 专题三 空间体积的计算 微点6 空间交叉图形公共部分体积的计算【培优版】
更新时间:2022-09-15 09:46:19
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(1)求长方体的表面积和它的外接球的表面积;
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【推荐2】已知矩形
内接于圆柱下底面的圆O,
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【推荐1】如图,三棱柱
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(2)求该三棱柱的外接球的表面积与内切球的体积.
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【推荐2】如图,其中
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【推荐1】如图,在几何体
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39284c1ef4a749b8683a7c79c4246672.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)求平面
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09d9d486b7f91ba933210dd013a7f2c.png)
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【推荐2】在正方体
中,
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e539f26ed5e0b20ff7220559324869a4.png)
(2)
平面
.
(3)平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
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(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c52091eb745de866044477641a7c55f.png)
(3)平面
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c52091eb745de866044477641a7c55f.png)
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