解题方法
1 . 如图,直三棱柱
中,
,
、
分别为
、
的中点,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
,二面角
的大小为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/3793dfdc-51f2-4c27-b6e2-1ccc3ecedc4a.png?resizew=168)
(Ⅰ)证明:
平面
;
(Ⅱ)求
与平面
所成的角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f1854ba6cc92481d7a616bd2788a47e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/926d1308d5db144e31b4d0211c63ef52.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/3793dfdc-51f2-4c27-b6e2-1ccc3ecedc4a.png?resizew=168)
(Ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b78172568aac9805d2ea2d5f742bf80c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(Ⅱ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
您最近一年使用:0次
2 . 在如图所示的四棱锥
中,已知
平面
,
,
,
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/2021/4/20/2703939383148544/2794627584000000/STEM/332e1b6b109940e8a600bda0235f1cef.png?resizew=225)
(1)求证:
平面
;
(2)求证:平面
平面
;
(3)求直线
与平面
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.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/fcd8e727e4efc22b49649f71ae9c9d84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2b377f22aafd3742ad860f77abaacef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de217862f189f14a9ffa0c40f5368f6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/2021/4/20/2703939383148544/2794627584000000/STEM/332e1b6b109940e8a600bda0235f1cef.png?resizew=225)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a90c5466cb1f9810d2739a7634a4352.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(3)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c884b508394b3ab50734b584d9ec783c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
您最近一年使用:0次
3 . 如图,在四棱锥
中,
平面
,四边形
是矩形,点
是
的中点,
.
![](https://img.xkw.com/dksih/QBM/2020/12/10/2611395527499776/2613237545279488/STEM/cebca15d-4577-4915-acd0-ad857119c3a9.png)
(1)证明:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc8d60ee3c8508e0ae2685aece8aa750.png)
![](https://img.xkw.com/dksih/QBM/2020/12/10/2611395527499776/2613237545279488/STEM/cebca15d-4577-4915-acd0-ad857119c3a9.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8c2b786c64e6a9ed2ec5670cde74f86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d682fd0344452998187cb6d48de3dd1.png)
您最近一年使用:0次
2020-12-13更新
|
206次组卷
|
4卷引用:广西桂林市灵川县潭下中学2021-2022学年高二下学期期中考试数学试题
名校
解题方法
4 . 如图,在四棱锥P-ABCD中,底面ABCD是正方形,侧面
底面ABCD,E为侧棱PD上一点.
平面ABE;
(II)求证:
;
(III)若E为PD中点,平面ABE与侧棱PC交于点F,且
,求四棱锥P-ABFE的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6785c7c85a503531649f9c9b4cbfcf04.png)
(II)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7dac702fe64edf1bc265da4b98cf2a0.png)
(III)若E为PD中点,平面ABE与侧棱PC交于点F,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/931bbffda5e872703c9947eccc47ede2.png)
您最近一年使用:0次
2020-11-06更新
|
1172次组卷
|
6卷引用:广西桂林市2020-2021学年高一上学期期末数学试题
名校
5 . 如图,在直三棱柱
中,
,
,D,E,F分别为AC,
,AB的中点.则下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/d097e246-7459-47cc-8703-80e72e0f50d3.png?resizew=165)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb717228e1762d335814a3adc90eae45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/d097e246-7459-47cc-8703-80e72e0f50d3.png?resizew=165)
A.![]() | B.![]() |
C.EF与![]() ![]() | D.点![]() ![]() |
您最近一年使用:0次
2020-10-12更新
|
2880次组卷
|
18卷引用:广西桂林市第十八中学2022-2023学年高二上学期期中考试数学试题
广西桂林市第十八中学2022-2023学年高二上学期期中考试数学试题江苏省南京市第十四中学2020-2021学年高二上学期学情调研测试数学试题(已下线)专题8.9 空间向量与立体几何单元测试卷-2021年新高考数学一轮复习学与练江苏省南京师大附中2020-2021学年高二上学期12月阶段检测数学试题江苏省南通中学2020-2021学年高二上学期期末数学试题广东省东莞市东方明珠学校2021届高三下学期5月质量检测数学试题北师大版(2019) 选修第一册 必杀技 第三章 4.3 课时1 用空间向量研究夹角问题重庆市万州第二高级中学2021-2022学年高二上学期第一次月考数学试题苏教版(2019) 选修第二册 限时训练 第10练 空间距离的计算重庆市南华中学校2021-2022学年高二上学期10月月考数学试题2023版 北师大版(2019) 选修第一册 名师精选卷 高考水平模拟性测试(一)河南省郑州市第七中学2022-2023学年高二上学期第一次月考数学试题广东省广州思源学校2022-2023学年高二上学期10月月考数学试题广东省中山市第一中学2021-2022学年高二上学期期中数学试题黑龙江省哈尔滨市宾县第二中学2022-2023学年高二上学期第一次月考数学试题北师大版(2019) 选修第一册 数学奇书 学业评价(三十一) 空间中的距离问题重庆市巫溪县尖山中学校2023-2024学年高二上学期第一次月考数学试题内蒙古呼伦贝尔市满洲里远方中学2023-2024学年高二上学期10月月考数学试题
6 . 在四棱锥
中,已知底面
为正方形,
底面
,且
,
为
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/8c58fcf8-ae1e-4aa7-856f-5229d73e95f8.png?resizew=143)
(1)求证:
平面
;
(2)求二面角
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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3b10835116b9b777a666b438c907b49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/8c58fcf8-ae1e-4aa7-856f-5229d73e95f8.png?resizew=143)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa69a2247ad4d5231aa361349b12f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a351d71fa01d3f5920e374a8ee7b524.png)
您最近一年使用:0次
解题方法
7 . 如图,在直三棱柱
中,
,
为
的中点,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/8373de5f-bb06-4041-bc91-4c8adff32b5a.png?resizew=161)
(1)求证:
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071e9a168f527f6d95627467f9a567ad.png)
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829018a6ca0aff95d89e3f7cd943274e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6db57eca2a7cbd91bc57372592580a76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/8373de5f-bb06-4041-bc91-4c8adff32b5a.png?resizew=161)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1c920d02068d0e63ffdab70786c526d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071e9a168f527f6d95627467f9a567ad.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd8579d3c939467a9db200c15a6a6f2c.png)
您最近一年使用:0次
解题方法
8 . 如图,在长方体
中,
,
为
的中点,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/cab0350e-4643-4966-9b62-1873635d5112.png?resizew=146)
(1)求证:
平面
;
(2)求平面
与平面
所成二面角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cff17a9aa7466b66b0c678f294dca021.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/cab0350e-4643-4966-9b62-1873635d5112.png?resizew=146)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fae7f4612c548b1f72a964ddb291cd2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db3ef97d64e58d311019b70fe5e2cc0d.png)
您最近一年使用:0次
解题方法
9 . 如图,在三棱柱
中,侧棱
平面
,
、
分别是
、
的中点,点
在侧棱
上,且
,
,求证:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/c1b84445-72f6-44b1-b45d-8da83be18f1e.png?resizew=151)
(1)直线
平面
;
(2)平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53b595f8a0517b63585b065ea65fffbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab93035abd5877f2e52041358b817a08.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/c1b84445-72f6-44b1-b45d-8da83be18f1e.png?resizew=151)
(1)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b78172568aac9805d2ea2d5f742bf80c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ee076fe7dbca5616c4e8a6869a355f4.png)
(2)平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2147971abecf15404665d75f577ebfff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ee076fe7dbca5616c4e8a6869a355f4.png)
您最近一年使用:0次
2020-02-19更新
|
441次组卷
|
2卷引用:广西桂林市2019-2020学年高一上学期期末数学试题
10 . 如图,已知四棱锥
中,底面
是棱长为2的菱形,
平面
,
,
是
中点,若
为
上的点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/8/679d49c5-3d8a-43b9-b65d-d455f1b233bd.png?resizew=188)
(1)求证:
平面
;
(2)求三棱锥
的体积.
![](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/362a58d6ebc2cc182151bde585e8ccad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4bae815289a0b750129ec66d60f402.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/8/679d49c5-3d8a-43b9-b65d-d455f1b233bd.png?resizew=188)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f27b771d29a081a83baf2ceb9b4c43df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)求三棱锥
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2019-10-21更新
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2卷引用:广西壮族自治区桂林市第十八中学2019-2020学年高二上学期10月月考数学试题