1 . 如图,在边长为2的正方形ABCD中,点E、F分别是AB、BC的中点,将
、
、
分别沿DE、EF、DF折起,使得A、B、C三点重合于点P,求四面体
外接球的表面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c771a4feb150ad9cff8d70431c97eb17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2ea13010e2399194be2a681310543e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13668f033d00acfc366f7e47949c4462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16fd1bc6147d69777b26a35d48522f7e.png)
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解题方法
2 . 设A,B,C,D是同一个半径为4的球的球面上四点,
为等边三角形且其面积为
,求三棱锥
体积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/604d037b88148502a5608e0285c76f35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
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3 . 在三棱锥
中,
,
,
,
,侧棱SB与底面ABC垂直,求三棱锥
的外接球半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c14a66ed4bd66df65bc42c4ac1ed15c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/443c7e2fbaf31ed59f8d6283c63ad54f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
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4 . 正四面体
的所有棱长均为12,球O是其外接球,M,N分别是
与
的重心,求球O截直线MN所得的弦长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
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5 . 正四面体
内接于半径为
的球,求正四面体的棱长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
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6 . 如图,棱长为6的正方体,截去八个一样的四面体,得到一个新的多面体,
(1)求新多面体的体积;
(2)新多面体的表面积是多少?
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/14/c1ee2bcd-0c57-49e3-b61e-883e8faf87b5.png?resizew=159)
(1)求新多面体的体积;
(2)新多面体的表面积是多少?
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7 . 如图,正方体
的棱长为
,将它沿相邻三个面的对角线截出一个三棱锥
,求剩下的几何体的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3da8c338342e38c9aa3f274c053fd5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac7a3e0ef4980cc0ca102f733d357263.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/23/9f3430fc-e015-4de5-b79a-fc88e6698d4a.png?resizew=154)
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8 . 如图,多面体ABCDE中,
平面ABC,平面
平面ABC,
是边长为2的等边三角形,
,AE=2.
(1)证明:平面
平面BCD;
(2)求多面体ABCDE的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c309e58bf083bad13abd549720a63a22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b1f4280bc9aaa3290262732eb887d1b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/22/bff742c4-d05a-4604-84b6-9d882b087c09.png?resizew=140)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e54cf75bbfc9db93d27937c8b8e977b9.png)
(2)求多面体ABCDE的体积.
您最近一年使用:0次
2023-05-21更新
|
1483次组卷
|
6卷引用:湖北省十堰市丹江口市第二中学2022-2023学年高一下学期5月月考数学试题
名校
9 . 如图,点B是AC为直径的半圆上的一动点
面
,
.
(1)若E为PC的中点,当
的面积最大时,求AE与面
所成的角的正弦值;
(2)过点A作平面
,分别交PB,PC于点M,N,当
时,求三棱锥
外接球的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b835d38f32031bdb970fd366f5e04016.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/11/28a68378-b4c6-402c-bfe9-3360f422e6f1.png?resizew=149)
(1)若E为PC的中点,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)过点A作平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d9105f139c37c74dcab39b136c267eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d82e1b9949d05ef17c0cd24eb9ff9e92.png)
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名校
解题方法
10 . 如图,已知四棱锥
的底面为菱形,且
,
,
.M是棱PD上的点,O是棱AB的中点,PO为四棱锥
的高,且四面体MPBC的体积为
.
(1)证明:
;
(2)若过点C,M的平面
与BD平行,且交PA于点Q,求多面体
体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f14f698605a196cf83ccba6a601d0e2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69a8b76e36783a69d14ec54af82c7df0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/26/064e9aaa-8371-429b-9bd1-87f78e18727b.png?resizew=222)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b74837b473f275b811eae37cfd3f4bdb.png)
(2)若过点C,M的平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4bfc2d40ad0c1b89a7bfab8d3ca9ce3.png)
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