名校
1 . 在多面体ABCDEF中,
,且
,
.
;
(2)若平面
平面
,求二面角
的余弦值;
(3)在(2)的条件下,求该多面体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39e01f404965baabb8942547d68e02a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b49515bae8d21363bcade4512ab631c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc085e78fcc8bdb6a944962975ab1bab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ccd5c41c921836b50f8e18abfdc5df3.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9367449a5847eade07e69f4feddcb027.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ae628604c47725bb01e22dff5dca8e5.png)
(3)在(2)的条件下,求该多面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
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2 . 坡屋顶是我国传统建筑造型之一,蕴含着丰富的数学元素.安装灯带可以勾勒出建筑轮廓,展现造型之美.如图,某坡屋顶可视为一个五面体,其中两个面是全等的等腰梯形,两个面是全等的等腰三角形.若
,
,且等腰梯形所在的平面、等腰三角形所在的平面与平面ABCD的夹角的正切值均为
,则该五面体的所有棱长之和为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37a3d15e7587b5419e568accf38dba3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cd91b08b48366af103519e89bca2681.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb29a1b25a1bf498d40513169d1b46d0.png)
A.117m | B.120m | C.127m | D.135m |
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3 . 如图,该多面体的表面由18个全等的正方形和8个全等的正三角形构成,该多面体的所有顶点都在同一个正方体的表面上.若
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/056c2272e0d10d6dd9706e6324d8e62d.png)
A.![]() | B.该多面体外接球的表面积为![]() |
C.直线MG与直线PQ的夹角为![]() | D.二面角![]() ![]() |
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2024-06-16更新
|
265次组卷
|
5卷引用:湖南省娄底市第三中学2023-2024学年高二下学期5月月考数学试题
名校
4 . 如图,在三棱锥
中,已知
.
;
(2)求侧面
与侧面
所成的二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c90d7e37f2fe4b59fa38e39f816c44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22b04a4591698f4f2a472f7ed6088674.png)
(2)求侧面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21665d21bbfb04410c78345de1fd15ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc9c9cfa597b444b5c9dbae7a825a695.png)
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2024-05-27更新
|
495次组卷
|
2卷引用:湖南省郴州市第一中学等校2023-2024学年高一下学期5月联考数学试题
解题方法
5 . 把边长为
的正方形
沿对角线
折起,当以
四点为顶点的三棱锥体积最大时( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c82a10b4f0c9323d726804c89dd9548.png)
A.![]() |
B.直线![]() ![]() ![]() |
C.平面![]() ![]() ![]() |
D.四面体![]() ![]() |
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6 . 如图,在平行六面体
中,
,
.
,求点P到直线BD的距离;
(2)求平面
与平面
所成夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cead0e8eadfdcefa334953e88864f424.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4d13ecb54b1006051d2561327aa4755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79229606d05f53c89b900e37c5cb6f6d.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2bf9ef324f1289e205e29fed105c38e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
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解题方法
7 . 在如图所示的直三棱柱
中,
分别是线段
上的动点.
平面
,求证:
;
(2)若
为正三角形,E是
的中点,求二面角
余弦值的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2f90a45697e150b04ab6a2d11420bd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ddef39ef9ed3da136c4ed8b5d28b73e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/063510e3c1fb6a7ccc3b8e3e3c7d660e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf498d061e4e8f4856717e8adb549c5c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98e384e0ffc3d599303b77ee2a12221e.png)
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23-24高三下·湖南长沙·阶段练习
名校
8 . 如图三棱锥
中,
,
,
.
;
(2)若平面
平面
,
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccfd3cc8d727f5d4f41c834f6851a094.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e91ac38719ac70e0597a72e7f0deceac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bbd7c2767c106faf27d6a97ebc8e739.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/585412bde1d2c7b297beaa78fd991130.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b33b7213d99a817bff19bcf740a0697c.png)
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9 . 如图,四棱锥
中,底面
为矩形,
底面
,点
在侧棱
上,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/3/c3dc0680-9693-446d-8d93-6562dda4fa65.png?resizew=154)
(1)证明:
是侧棱
的中点;
(2)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fb2e071d4e01107dcf7d95cbb86b415.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/106a1269445c24d80b2e027071a6ecd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2bc5e50b8dfa02601c70822252854a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80be421a052e5eb07a61115d89cdf9ba.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/3/c3dc0680-9693-446d-8d93-6562dda4fa65.png?resizew=154)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2bc5e50b8dfa02601c70822252854a.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1497bbe0ac8de93f8c8623d5e700057.png)
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解题方法
10 . 已知S为圆锥的顶点,
为该圆锥的底面圆
的直径,
为底面圆周上一点,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bceb81947c64c43ebee982e63f6eaf28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a1e5b7264abd0cd577052f5271ed51.png)
A.该圆锥的体积为![]() |
B.![]() |
C.该圆锥的侧面展开图的圆心角大于![]() |
D.二面角![]() ![]() |
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2024-01-15更新
|
669次组卷
|
2卷引用:湖南省长沙市湖南师大附中2024届高三上学期月考数学试题(五)