名校
1 . 如图所示,四棱锥
中,底面
为矩形,
平面
,
,
,点
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/25/27e2bb49-56cf-4035-8d67-71418900b692.png?resizew=163)
(1)证明:
;
(2)求二面角
的大小.
![](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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83a04565a8ebaa111894b724b0ba266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a88c44f558705de3bcefcfc0ece96b8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/25/27e2bb49-56cf-4035-8d67-71418900b692.png?resizew=163)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4486d52b6e410fd7b60428121d96cef.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbeab80976db9b4689b9446cda06196a.png)
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解题方法
2 . 如图①所示,长方形
中,
,点M是边CD的中点,将
沿AM翻折到
,连结PB,PC,得到图②的四棱锥
.
(1)若棱PB的中点为N,求CN的长;
(2)设
的大小为
,若
,求平面
和平面
夹角余弦值的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8716b5aad93d97ca1c3791b9c717cc0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f9fba8a4098c1a0515286eb8d616dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb62dd4766d11cfec3aee092b99e40c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfb216a6b4dfa1280e1e67d172fea409.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/26/6be74261-5155-450a-8e60-6f5c6bd730ff.png?resizew=374)
(1)若棱PB的中点为N,求CN的长;
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212e8c352c4d9b022a057d7d7fa7dd14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd571fb420cd6b9ecb83989f1d39c38f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c745df4f226027778d5fe45b6501b822.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
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3 . 如图,在三棱台
中,
,
,
,
.
平面
;
(2)若直线
与平面
所成角为
,求平面
和平面
所成角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/986ba572d8373df48c996f8c8611498c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ed8f7d3d7043d4b1eb98fc5c4e2fcd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b9d0c688e55286443c9974797fc647f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de19416fa3c38b1b82abf0937573f9fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d052663101ca930843abd98cbd61c19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a28d6477c85c5a4ac410a884e92fbe53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/926d1308d5db144e31b4d0211c63ef52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/678b28fddb166d90878d24d6e5481080.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
2023-07-26更新
|
373次组卷
|
3卷引用:湖南省株洲市第一中学2021-2022学年高一下学期期中考试数学试题
名校
4 . 如图,在三棱台
中,底面
为等边三角形,
平面
,
,其中
为
上的点,且
.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
平面
;
(2)求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e335c76057d8838bfe1bfa1151fa0a70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c59802bde1dc59ba9000157b08463b2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41104641f3e2260d00aeadf8fb8a078a.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea848cd2aa3a464618020475097949fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
您最近一年使用:0次
2023-07-18更新
|
582次组卷
|
3卷引用:湖南省株洲市第二中学2021-2022学年高一下学期期中数学试题
名校
5 . 如图1,平面四边形
中,
,
,
,E为
的中点,将
沿对角线
折起,使
,连接
,得到如图2所示的三棱锥
.
(1)证明:平面
平面
;
(2)已知直线
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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98e486a1aad96167ff62f6fb5136e0bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bf10d92f20501e19d25f6f4159aab89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aa1162d5481e2441fe5bc0d49a576b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/26/8d6286fc-3716-438a-b431-6dfbbd9d7045.png?resizew=373)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d28c625d7ac6878957facc8274d459c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(2)已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dfaad4c4467e27421876d8f2a4371d2.png)
您最近一年使用:0次
名校
6 . 如图,四棱柱
的底面
是菱形,
平面
,
,
,
,点
为
的中点.
(1)求证:直线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/24/6179c3d8-6224-400e-acd6-3e4ea8f92a47.png?resizew=135)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d56631ddece296d71607fc907b56d2a.png)
您最近一年使用:0次
2023-05-23更新
|
2623次组卷
|
10卷引用:湖南省株洲市第二中学2021-2022学年高一下学期期中数学试题
湖南省株洲市第二中学2021-2022学年高一下学期期中数学试题吉林省普通高中友好学校第三十六届联合体2022-2023学年高一下学期期中联考数学试题(已下线)模块一 专题5 立体几何初步(3)(北师大版)(已下线)模块一 专题5 立体几何初步(3)(人教B)(已下线)模块一 专题3 立体几何初步(3)(人教A)(已下线)第04讲 利用几何法解决空间角和距离19种常见考法归类(3)陕西省宝鸡教育联盟2022-2023学年高一下学期7月期末联考数学试题(已下线)模块一 专题5 立体几何初步(3)(苏教版)广西北海市2022-2023学年高一下学期期末质量检测数学试题宁夏石嘴山市平罗中学2022-2023学年高一下学期期末考试数学试题
7 . 如图,在四棱锥
中,底面
是边长为2的菱形,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
底面
,
,
为
的中点,
为
的中点.
(1)求证:直线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
平面
;
(2)求二面角
的正弦值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06a5faf3cbb633fc4294c8ce703c64c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff5a86745bfe1dfe7bc2683811210330.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb2d3f02cb9007cd4a90ea30f6dd8181.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/4/ef24f9d4-4137-48cd-809e-fa4b9c4fe201.png?resizew=180)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3201d3796ed9a29338aac25245a7c8e2.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/345d6db266003b4aebea44c46c10fabe.png)
您最近一年使用:0次
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解题方法
8 . 如图,在三棱锥P-ABC中,∠ACB=90°,PA⊥底面ABC.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/1/9757cabc-de2f-4346-95e8-552c89440e03.png?resizew=163)
(1)求证:平面PAC⊥平面PBC;
(2)若AC=BC=PA,求平面PAB与平面PCB所成二面角的大小.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/1/9757cabc-de2f-4346-95e8-552c89440e03.png?resizew=163)
(1)求证:平面PAC⊥平面PBC;
(2)若AC=BC=PA,求平面PAB与平面PCB所成二面角的大小.
您最近一年使用:0次
2023-03-31更新
|
682次组卷
|
5卷引用:湖南省长沙市芙蓉高级中学2022-2023学年高二上学期期中数学试题
解题方法
9 . 如图所示,
平面
,
,
,
,则二面角
的余弦值大小为________ .
![](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/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb4f142d753f5878ad14a8623d46cb46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f144992e1cbee34868abce1e5ad38c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a438393ddfc7da1804baf4932442bb35.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/15/48477781-dfc7-460a-9ce6-693d090fa6ee.png?resizew=140)
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解题方法
10 . 截角四面体是一种半正八面体,可由四面体经过适当的截角,即截去四面体的四个顶点所产生的多面体.如图所示,将棱长为
的正四面体沿棱的三等分点作平行于底面的截面,得到所有棱长均为a的截角四面体,则下列说法错误的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/c9279c45-53e4-4fde-8e18-d1c8022ffd15.png?resizew=165)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9878a063abcb6098d10560f2bf2d4b71.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/c9279c45-53e4-4fde-8e18-d1c8022ffd15.png?resizew=165)
A.二面角![]() ![]() |
B.该截角四面体的体积为![]() |
C.该截角四面体的外接球表面积为![]() |
D.该截角四面体的表面积为![]() |
您最近一年使用:0次
2023-01-12更新
|
1396次组卷
|
6卷引用:湖南省长沙市宁乡市第一高级中学2022-2023学年高三上学期12月月考数学试题
湖南省长沙市宁乡市第一高级中学2022-2023学年高三上学期12月月考数学试题重庆市第八中学校2022届高三下学期调研检测(十四)数学试题湖南省邵阳市2023届高三上学期一模数学试题(已下线)模块五 空间向量与立体几何-2(已下线)专题2 求二面角的夹角(2)专题15空间向量与立体几何(选填题)(2)