解题方法
1 .
为圆锥的顶点,
是圆锥底面的圆心,
是底面的内接等腰直角三角形,
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19bc7774144c164f7ebaeca54fa657e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3cd6cbcac68a79897e63c423251ad4b.png)
A.![]() | B.圆锥![]() ![]() |
C.二面角![]() | D.![]() ![]() ![]() |
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2 . 如图,已知正方形
与矩形
所在的平面互相垂直,
,
,
分别为
,
的中点.
(1)证明:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd4b93d7abcfc4c3df48f03aa969c17f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19bebae04c72b934bfbbf0b4d01f164f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/75d74511-6814-4722-9fe7-de00d8913c92.png?resizew=181)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fa3254460ecbacecb3e57c5dce227f4.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c5a01b5afcb0e7c3ccf2f00ef4a93df.png)
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23-24高二上·北京·期末
名校
解题方法
3 . 有下面两组几何体,根据要求填写所有符合条件的序号.
第①组:两个三棱锥分别是下图(左)中的
和下图(右)中的
.
第②组:两个均由棱长为1的正方体组成的组合体.
其中,第_________ 组中的两个几何体的体积相同,第_________ 组中的两个几何体不同.(两个几何体相同指的是它们可以通过整体平移或旋转后重合.)
第①组:两个三棱锥分别是下图(左)中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fae4be02579c2de70ed46183c908cb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39da43b5645ca5c281efd019059112c2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/47abf3c4-6038-44b3-ba59-d4f0501948bf.png?resizew=330)
第②组:两个均由棱长为1的正方体组成的组合体.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/bbca345e-760c-41a5-963f-8a899e7e49ee.png?resizew=300)
其中,第
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解题方法
4 . 如图所示,在棱长均相等的平行六面体
中
分别为线段
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/55444ffb-64db-4ee4-8765-a3692606418e.png?resizew=168)
(1)设
,请以向量
表示
;
(2)求证:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05d1641ee630d23b48c7d179d09b40d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2695585c5bccde7f9b49d92ca0d3916.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/55444ffb-64db-4ee4-8765-a3692606418e.png?resizew=168)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dfb9769a14ebf5cbc5fa0c06ce96435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae951e0bb5a2a406f1572fc1e4964265.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae54940f33b8714da5fe3b7546f8b3dc.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba0fbd88fdb064072eedd136e9cb41ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
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解题方法
5 . 在正方体
中,点
在底面
所在的平面上运动.下列说法不正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/19/a6d2e66f-2634-4b64-bcee-b16bdc578c6c.png?resizew=162)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/19/a6d2e66f-2634-4b64-bcee-b16bdc578c6c.png?resizew=162)
A.若点![]() ![]() ![]() |
B.若![]() ![]() ![]() ![]() |
C.若点![]() ![]() ![]() ![]() ![]() |
D.若点![]() ![]() ![]() ![]() |
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解题方法
6 . 如图,在三棱柱
中,侧面
为菱形,
底面
,
.
(1)求证:平面
平面
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d1d2e0f281222a5f289ea4008370aed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9250d4d2b365787787dd03dbb42eb3e1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/a3c4aeb9-f980-4554-ae69-e3d856955d68.png?resizew=160)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85a2e10a5aebe40a9018d5ee3ade7af8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
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解题方法
7 . 如图,在四棱锥
中,底面
为矩形,
平面
,垂足为O,E为PC的中点,
平面
.
(1)证明:
.
(2)若
,
,PC与平面
所成的角为
,求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3e126c16032892966489053f44b9048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3a04ea8ebc597fd1f5d6bb8df181a2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/19/1527497e-8a18-4660-88a9-2ae1e128484b.png?resizew=180)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed66431681da1db8f7cb0f40cd19201.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/585288e61871608f6ff8f7e4a0beafbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a49bdf1dcfe6c344dd2442669e72c44b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ad1b0a76a887783392268ae203ad22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
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解题方法
8 . 刍甍是《九章算术》中出现的一种几何体,如图所示,其底面
为矩形,顶棱
和底面平行.已知
,
和
均为等边三角形,若二面角
和
的大小均为
,则该刍甍的体积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0041488020a3e19377b18a70fbf82e7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe51b50eca45db5d8ca5f4949c56d137.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c911b404bbb8f8d5f1470585fa31ad97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b01ad3fe1fcfd32718b835249326d2e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a8f3a8b0608ec011ad95c522fd2ea4d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/19/1f59e29a-0c03-457d-8629-599cb05ffcf8.png?resizew=180)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
9 . 如图所示,在直三棱柱
中,
,
,
,
分别是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/19/f5fd096f-8d72-4b22-8bd3-4e75ebe177ef.png?resizew=153)
(1)求证:
平面
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c77d189d2590a45c55b8c2f1da54f06c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2743e10dd8bce468d1d397b3e9a550d3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/19/f5fd096f-8d72-4b22-8bd3-4e75ebe177ef.png?resizew=153)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7592c4f01c8e06c7ee90df5b9413a9f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e53b212640dadf751ef7f65a78a209.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
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10 . 如图1,在直角梯形
中,
分别为
的中点,沿
将平面
折起,使二面角
的大小为
,如图2所示,设
分别为
的中点,
为线段
上的动点(不包括端点).
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/19/df14bad5-c4d9-4c33-a87c-420d53d397de.png?resizew=277)
(1)求证:
;
(2)若直线
与平面
所成角的正弦值是
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b937ffb8f3a3dbb7396e188b1fa1f56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d93949d8a15aca4e79cedb978590571.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e41c2d7ae6aaf6d91129ed5221a415a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69856a547e733af483753a1dc51f47bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e39ee40b5a17a31195e83ec5f8e0b819.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/19/df14bad5-c4d9-4c33-a87c-420d53d397de.png?resizew=277)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49d7650a6679da9676f6d92654d2d6ef.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438f34bc8b04e8c494b91306ac6fe352.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb5391d00655e9e4ee30fe9934b2f02c.png)
您最近一年使用:0次