名校
1 . 如图,已知在矩形
中,
,
,点
是边
的中点,
与
相交于点
,现将
沿
折起,点
的位置记为
,此时
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/8/39a0bfcb-0355-4523-a217-5a44acf0472b.png?resizew=311)
(1)求证:
平面
;
(2)求证:
面
;
(3)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ea52361458ce2e49ed0fe99d8e6c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.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/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d30374a2dad85e336ceaa462be7e00e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9b123ae31090740589ba27a846620b5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/8/39a0bfcb-0355-4523-a217-5a44acf0472b.png?resizew=311)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/982d01f052709b72afeaf1015fc7acc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e536350bcd19804313eb04f43622943c.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66b1c91be4cd269b869d0fa2956b3685.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e536350bcd19804313eb04f43622943c.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d7f66b146fccec50efa1c316aa1afe0.png)
您最近一年使用:0次
2022-07-06更新
|
1131次组卷
|
6卷引用:江苏省常州市溧阳市2022-2023学年高一下学期期末数学试题
江苏省常州市溧阳市2022-2023学年高一下学期期末数学试题江苏省常州市华罗庚中学2022-2023学年高一创新班下学期期末数学试题广东省汕头市2021-2022学年高一下学期期末数学试题福建省福州第一中学2022-2023学年高二上学期教学质量检测(12月)数学试题 (已下线)微专题16 利用传统方法轻松搞定二面角问题(已下线)高一下学期数学期末考试高分押题密卷(五)-《考点·题型·密卷》
名校
解题方法
2 . 如图所示,四棱锥S-ABCD的底面是正方形,每条侧棱的长都是底面边长的
倍,P为侧棱SD上的点.
(1)求证:AC⊥SD;
(2)若SD
平面PAC,则侧棱SC上是否存在一点E,使得BE
平面PAC?若存在,求SE∶EC的值;若不存在,试说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/13/bf2e626d-6761-463f-9189-d2eb420df216.png?resizew=160)
(1)求证:AC⊥SD;
(2)若SD
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
您最近一年使用:0次
2023-06-11更新
|
354次组卷
|
2卷引用:江苏省盐城中学2022-2023学年高二下学期期中数学试题
名校
3 . 在如图所示的直三棱柱
中,D、E分别是
的中点.
平面
;
(2)若
为等边三角形,且
,M为
上的一点,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b822c51345a72700a6562d04be6e750.png)
求直线
与直线
所成角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.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/b91ff123ed8471d1354dea825775e416.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1baa3d0db9ad31d33c2883a6efed1dc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b822c51345a72700a6562d04be6e750.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05250abe6da85eb0b555948d7dbaf317.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9399c9a2a31b0e3165aea2d6ccc4f7c9.png)
您最近一年使用:0次
2024-02-03更新
|
332次组卷
|
7卷引用:第13章 立体几何初步 章末题型归纳总结 (1)-【帮课堂】(苏教版2019必修第二册)
(已下线)第13章 立体几何初步 章末题型归纳总结 (1)-【帮课堂】(苏教版2019必修第二册)(已下线)重难点专题13 轻松搞定线面角问题-【帮课堂】(苏教版2019必修第二册)2017届河北武邑中学高三文上期中数学试卷2017届河南百校联盟高三文11月质监数学乙试试卷上海市金山中学2021-2022学年高二上学期期中数学试题宁夏回族自治区银川市银川一中2024届高三上学期第六次月考数学(文)试题(已下线)专题8.9 空间角与空间距离大题专项训练-举一反三系列
2022高三·全国·专题练习
解题方法
4 . 如图①,在直角梯形
中,
,
,
,
为
的中点,
、
、
分别为
、
、
的中点,将
沿
折起,得到四棱锥
,如图②.求证:在四棱锥
中,
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b027ed57b9c6f24e27ec0ae282c76efa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/538de9ad824b230984e27b76417ebb45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d390782b8ea7016628ee68403dcbfbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cf60f382809c325644b9f4217de33ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177678001b2ccde1db8f57fa5e017002.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12d8677ae5ca7acf874d93789425d172.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe8a84ca3a13f82aff1a022edc66065.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/3ef8b4bb-1820-41c5-80c2-dd4d2f9d1cbc.png?resizew=279)
您最近一年使用:0次
2022-11-02更新
|
688次组卷
|
6卷引用:13.2.4 平面与平面的位置关系 (1)
(已下线)13.2.4 平面与平面的位置关系 (1)(已下线)13.2.4 平面与平面的位置关系(已下线)专题09 基本图形的平行与垂直-期中期末考点大串讲(苏教版2019必修第二册)(已下线)第03讲 空间直线、平面的平行 (高频考点—精讲)-2(已下线)8.5.3 平面与平面平行 (精讲)(2)-【精讲精练】2022-2023学年高一数学下学期同步精讲精练(人教A版2019必修第二册)(已下线)8.5.3 平面与平面平行(精讲)-【题型分类归纳】2022-2023学年高一数学同步讲与练(人教A版2019必修第二册)
名校
5 . 如图,在直三棱柱
中,
为
的中点.
![](https://img.xkw.com/dksih/QBM/2022/9/26/3074832366305280/3075342448058368/STEM/1b51156345f348d4901e8bdac4eafe94.png?resizew=214)
(1)记平面
与平面
时交线为
, 证明:
;
(2)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df226b960fe63b037a0b85443fd49f98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/2022/9/26/3074832366305280/3075342448058368/STEM/1b51156345f348d4901e8bdac4eafe94.png?resizew=214)
(1)记平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af68a7bf0da4f7c6f739d2e2461ad9b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e450f5f4225c000c2e8ea1cc14c140f2.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7692c644180b475efb60304ae8f811fc.png)
您最近一年使用:0次
2022-09-27更新
|
689次组卷
|
6卷引用:江苏省扬州、盐城、南通部分学校2022届高三上学期10月第一次大联考数学试题
江苏省扬州、盐城、南通部分学校2022届高三上学期10月第一次大联考数学试题江苏省盐城 、淮安、 宿迁 、如东等地2021-2022学年高三上学期第一次大联考数学试题江苏省苏州市张家港高级中学2021-2022学年高三上学期期中模拟数学试题福建省龙岩市第一中学2022届高三上学期第三次半月考数学试题(已下线)考点34 二面角【理】-备战2022年高考数学典型试题解读与变式(已下线)第53讲 章末检测八
名校
解题方法
6 . 如图,正方形ABCD和菱形ACEF所在平面互相垂直,
.四棱锥
的体积是
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/18/c6705ee4-da66-4003-9fc9-4f14ad53ee46.png?resizew=157)
(1)求证:
平面ABF;
(2)求AB的长度及四面体ABEF的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c1f4d1a70ef462f51f6d0c2db5fa6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c753cb1eb73fd8d136d00462970797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e38f2b35473fa9afa57f66550e3f6d5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/18/c6705ee4-da66-4003-9fc9-4f14ad53ee46.png?resizew=157)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b78172568aac9805d2ea2d5f742bf80c.png)
(2)求AB的长度及四面体ABEF的体积.
您最近一年使用:0次
名校
7 . 如图,在四棱锥
中,底面
为正方形,
、
、
、
分别为
、
、
、
的中点.
![](https://img.xkw.com/dksih/QBM/2022/1/5/2888023032455168/2888777436717056/STEM/4b59e41050f8425ea785f453f7596d20.png?resizew=241)
(1)证明:
平面
;
(2)若平面
平面
,
为等边三角形,求二面角
的正弦值.
![](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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/2022/1/5/2888023032455168/2888777436717056/STEM/4b59e41050f8425ea785f453f7596d20.png?resizew=241)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dcafa398cc6b6079883e7ad153eb62d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6221be113e161825e54d48a2fb16d516.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/290a37874cd284fb1a8c864769ce50c9.png)
您最近一年使用:0次
2022-01-06更新
|
712次组卷
|
2卷引用:江苏省南京市中华中学2022-2023学年高三上学期大练(1)数学试题
21-22高二·湖南·课后作业
解题方法
8 . 已知正方体
的棱长为2,E,F分别是
,
的中点.求证:
平面ADE.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/954744a63798bd25c8360e4a61455273.png)
您最近一年使用:0次
2022-03-05更新
|
627次组卷
|
5卷引用:专题09 空间向量与平行关系(重点突围)-【学霸满分】2022-2023学年高二数学下学期重难点专题提优训练(苏教版2019选择性必修第二册)
(已下线)专题09 空间向量与平行关系(重点突围)-【学霸满分】2022-2023学年高二数学下学期重难点专题提优训练(苏教版2019选择性必修第二册)(已下线)2.4.4 向量与距离(已下线)第30讲 平面与平面平行(已下线)8.5.3 平面与平面平行(分层作业)-【上好课】2022-2023学年高一数学同步备课系列(人教A版2019必修第二册)湘教版(2019)选择性必修第二册课本习题 习题2.4
23-24高二上·全国·期末
解题方法
9 . 如图,在三棱柱
中,四边形
为菱形,
,
,
,平面
平面
,Q在线段上移动,P为棱
的中点.
![](https://img.xkw.com/dksih/QBM/2023/12/25/3396729386549248/3396783588081664/STEM/0db9a04b71be464e9730451eabd0f7dc.png?resizew=216)
(1)若Q为线段AC的中点,H为BQ中点,延长AH交BC于D,求证:
平面
;
(2)若二面角
的平面角的余弦值为
,求点P到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72f0d0e78101fef36a75b70ac7e7cf5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8fba6dc92460fa44832398fd2868940.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61cdaadeae37736a1e6dd93fa1fe712f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://img.xkw.com/dksih/QBM/2023/12/25/3396729386549248/3396783588081664/STEM/0db9a04b71be464e9730451eabd0f7dc.png?resizew=216)
(1)若Q为线段AC的中点,H为BQ中点,延长AH交BC于D,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a5edfe97aeab0cf16b40fa9d2e15f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ffba8658b0023316117e1536cbf806.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39eefa58485e43a86a1931a2aa7222a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5ec70bc9d4f8f5df312e2f09ee3bcb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fed1f54c1b008a633326db4f20288c5.png)
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2023高三·全国·专题练习
解题方法
10 . 如图,已知正方体
的棱长为
,
、
分别为棱
、
的中点,证明:直线
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ad6b3d073d8dd1cb7d9c89116b9d81.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/21/a7737305-c285-4977-9260-14c0df17a0e5.png?resizew=147)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.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/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a8ec2583c364c079a7b1bfb1e8fe0c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ad6b3d073d8dd1cb7d9c89116b9d81.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/21/a7737305-c285-4977-9260-14c0df17a0e5.png?resizew=147)
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