名校
解题方法
1 . 如图所示,在长方形
中,
,
为
的中点,以
为折痕,把
折起到
的位置,且平面
平面
.
;
(2)求四棱锥
的体积;
(3)在棱
上是否存在一点P,使得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac8b40d14544a9be0bebdb276f0fa865.png)
平面
,若存在,求出点P的位置;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c79e56bc6f1db8f446fc5bd34a08865.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63b43490ca09467a4c8cd8cfe91c94e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84f9c64303370347131dd9d8c5c70c01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70fd4f68511d2393905617bfdeddddec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ff27eea7545bb06f9472f91290c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c75d1b97dc32e2b99bccd4d8a02ef17.png)
(2)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f7d528d7d5aea71bb3d9df16055c2a7.png)
(3)在棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d226aef207ce71a381d6f63801cc9d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac8b40d14544a9be0bebdb276f0fa865.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d67be899bc131ec1b9921ae9787c40d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
您最近一年使用:0次
2024-05-12更新
|
1822次组卷
|
10卷引用:安徽省合肥市第十一中学2020-2021学年高二上学期第一次月考数学(理)试题
安徽省合肥市第十一中学2020-2021学年高二上学期第一次月考数学(理)试题(已下线)【新东方】杭州新东方高中数学试卷324江西省抚州市金溪县第一中学2020-2021学年高二上学期入学考试数学(理)试题湖南省邵阳市邵东市第三中学2020-2021学年高一下学期第三次月考数学试题广东省东莞市东莞实验中学2022-2023学年高一下学期5月月考数学试题广东省东莞市东莞高级中学2022-2023学年高一下学期期中数学试题重庆市永川北山中学校2022-2023学年高一下学期期中数学试题(已下线)第八章 本章综合--考点强化训练【第一练】“上好三节课,做好三套题“高中数学素养晋级之路(已下线)专题06 立体几何初步解答题热点题型-《期末真题分类汇编》(江苏专用)(已下线)专题04 第八章 立体几何初步(2)-期末考点大串讲(人教A版2019必修第二册)
名校
2 . 如图所示,在五棱锥
中,侧面
底面
,
是边长为2的正三角形,四边形
为正方形,
,且
,
是
的重心,
是正方形
的中心.
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18607f1bfa80b6a472084a960a3bbb6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6501f1c913a4ef64957a2f01ab5baa15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c92d220be10b55272aab5bacd9f69721.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bd6a2b112facda441f4e34bf5c145fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a16dc02090b6e9263555061f14fbc8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c92d220be10b55272aab5bacd9f69721.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6cc36cda92e01d6f85e9e2e6c0917ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98e384e0ffc3d599303b77ee2a12221e.png)
您最近一年使用:0次
2023-09-16更新
|
300次组卷
|
4卷引用:安徽省合肥市庐阳区第一中学2019-2020学年高二上学期期末数学(理)试题
安徽省合肥市庐阳区第一中学2019-2020学年高二上学期期末数学(理)试题安徽省合肥市第一中学2019-2020学年高二上学期期末理科数学试题湖南省长沙市东雅中学2022-2023学年高二下学期入学考试数学试题(已下线)专题07 空间直线﹑平面的垂直(二)-《知识解读·题型专练》(人教A版2019必修第二册)
名校
3 . 已知正方体
的棱长为
,
为棱
的中点,平面
过点
,
,则平面
截正方体所得截面的周长为__________ .
![](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/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a1fea99f95f16dfb7bdb33f7cf39dbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
您最近一年使用:0次
2023-08-01更新
|
238次组卷
|
10卷引用:广东省广州市2019-2020学年高三下学期调研考试数学(文)试题
广东省广州市2019-2020学年高三下学期调研考试数学(文)试题2020届陕西省高三第三次联考文科数学试题2020届陕西省高三第三次联考理科数学试题(已下线)7.2 空间几何中的垂直(精练)-【一隅三反】2022年高考数学一轮复习(新高考地区专用)(已下线)第2讲 空间点、线、面的位置关系(练)-2022年高考数学二轮复习讲练测(新教材地区专用)安徽省合肥市第六中学2022届高三下学期高考前诊断暨预测文科数学试题江西省重点中学九江六校2022-2023学年高一下学期期末联考数学试题(已下线)第07讲 空间直线﹑平面的垂直(二)-《知识解读·题型专练》(已下线)专题04空间点、直线、平面的位置关系与空间直线、平面的平行-期末真题分类汇编(新高考专用)(已下线)专题08立体几何期末14种常考题型归类(2) -期末真题分类汇编(人教B版2019必修第四册)
名校
4 . 如图1,⊙O的直径
,点
为⊙O上任意两点,
,
,F为
的中点,沿直径
折起,使两个半圆所在平面互相垂直.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/42262b53-8e0b-4bef-91bc-7fa8cc29f78a.png?resizew=375)
(1)求证:OF
面ACD;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/897a87d38d3993ef4f300f9af099add0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e0b64d25ddd18454f88e40c45d7d8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed41d321f4c0717ac5b443aad942d9a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/42262b53-8e0b-4bef-91bc-7fa8cc29f78a.png?resizew=375)
(1)求证:OF
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c2898853a3396f0878af9eac934416d.png)
您最近一年使用:0次
2023-01-04更新
|
280次组卷
|
6卷引用:辽宁省沈阳市东北育才学校2014-2015学年高二上学期第二次段考数学试题(理科)
辽宁省沈阳市东北育才学校2014-2015学年高二上学期第二次段考数学试题(理科)湖北省荆州中学2020-2021学年高二上学期期末数学试题江苏省南京师范大学附属中学2020-2021学年高二上学期期末数学试题云南省玉溪第一中学2020-2021学年高二4月月考数学(理)试题苏教版(2019) 选修第二册 名师精选 第六章 第二单元 空间向量的应用 A卷(已下线)专题8.16 空间角大题专项训练(30道)-2022-2023学年高一数学举一反三系列(人教A版2019必修第二册)
5 . 如图
,等腰梯形
中,
,
,
,
为
中点,
为
中点.将
沿
折起到
的位置,如图
.
(1)证明:
平面
;
(2)若平面
平面
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f526235f13fe56495391abb823a1be07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bc9d52427f4ae96a6191ebd1368a5ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438bf2134641f9950932bd667188d63c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/11/28b497b1-b73d-4618-93de-171bc835613e.png?resizew=417)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/653078cf75cab77eee1417ad02d9b76d.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a832b538d0bd5a0051d485fae371a51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b3351b2e5de2240185f415ffb26273.png)
您最近一年使用:0次
2023-08-10更新
|
646次组卷
|
7卷引用:河北省张家口市2019-2020学年高三11月阶段检测数学(文)试题
河北省张家口市2019-2020学年高三11月阶段检测数学(文)试题2020届湖南省长沙市雅礼中学高三第六次月考数学(文)试题浙江省宁波市海曙区2023届高三下学期2月开学考试数学试题江西省南昌市八一中学2023届高考三模理科数学试题(已下线)第04讲 直线、平面垂直的判定与性质(练习)(已下线)考点9 垂直的判定与性质 2024届高考数学考点总动员(已下线)专题8.11 立体几何初步全章十四大压轴题型归纳(拔尖篇)-举一反三系列
名校
6 . 如图,矩形
和菱形
所在的平面相互垂直,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/fa69c52c-37c0-46c3-87c7-efaab67b4c52.png?resizew=180)
(1)求证:
平面
;
(2)求
,
,求直线
与面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2f03af2eccaab21d99c8afb24034d0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/fa69c52c-37c0-46c3-87c7-efaab67b4c52.png?resizew=180)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071159cac13097ea0928285bc1be66d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fa3254460ecbacecb3e57c5dce227f4.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
您最近一年使用:0次
2023-02-25更新
|
316次组卷
|
3卷引用:黑龙江省大庆市大庆中学2020-2021学年高三上学期期中数学试题
解题方法
7 . 如图,在三棱锥
中,点
、
分别是棱
、
的中点,
,
,平面
平面
. 求证:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/d8f2ff37-4e98-4c0b-8c60-303e1a3399db.png?resizew=179)
(1)
平面
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13d28cb7181257cf732af4b615fc47d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf6dc837ae85207789b94d109c5c2eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/d8f2ff37-4e98-4c0b-8c60-303e1a3399db.png?resizew=179)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35333abd7f02d663d15251bc5cbbf921.png)
您最近一年使用:0次
解题方法
8 . 正方形ABCD的边长为2,E、F分别是AB和CD的中点,将正方形沿EF折成直二面角如图所示,M为矩形AEFD内的一点,MOEF于点O,如果MBE=MBC,
,那么线段MO的长为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a89d7c3ac98d389e75cb8c1a9df69984.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/9/736a576d-bc76-40b5-94c7-3b3a05ec52db.png?resizew=225)
您最近一年使用:0次
解题方法
9 . 在长方体
中,
,
,
是
的中点,
是
的中点.若异面直线
与
所成的角为
,距离为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/102d1119e59ab1d18c06784f9bf2be99.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50857bcc9b0377b73c2c0f98bae0f0a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a2cda9e5690d90d24c318895db59a45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/102d1119e59ab1d18c06784f9bf2be99.png)
![](https://img.xkw.com/dksih/QBM/2021/8/21/2790864051216384/2809189144002560/STEM/03fef14d96074bb9ae526484c0fbf9ee.png?resizew=228)
您最近一年使用:0次
真题
10 . 已知点
,
分别是正方形
的边
,
的中点.现将四边形
沿
折起,使二面角
为直二面角,如图所示.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/41c45b60-a627-425c-b9bf-8a2262895c49.png?resizew=184)
(1)若点
,
分别是
,
的中点,求证:
平面
;
(2)求直线
与平面
所成角的正弦值.
![](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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e41c2d7ae6aaf6d91129ed5221a415a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69856a547e733af483753a1dc51f47bf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/41c45b60-a627-425c-b9bf-8a2262895c49.png?resizew=184)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96b8c2721ada247b03f41f328539b301.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e41c2d7ae6aaf6d91129ed5221a415a7.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369eb8ad56da7dc1cdb7c43762be4bee.png)
您最近一年使用:0次
2021-09-15更新
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5924次组卷
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7卷引用:2020年山东省春季高考数学真题
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