名校
1 . 如图,四棱锥
中,侧面
为等边三角形且垂直于底面
,
.
(1)证明:
;
(2)若直线
与平面
所成角为
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ffca6aab4f6441c34aaaf243a069965.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83b76a280fc562446ee8ddd2d6bf1d4.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307d38cc7012c328f1f22aa793fe76d7.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09dc1ca2cdd7aef28c218763d3e4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1069d514c3c32aeabd274475ee209ed6.png)
![](https://img.xkw.com/dksih/QBM/2017/12/18/1841217855692800/1843932498198528/STEM/470bb50a8d364cda98aee78668c09e4a.png?resizew=204)
您最近一年使用:0次
2017-09-19更新
|
1652次组卷
|
10卷引用:【全国百强校】湖北省武汉市第六中学2019届高三12月月考数学理试题
【全国百强校】湖北省武汉市第六中学2019届高三12月月考数学理试题湖北省孝感高级中学2020-2021学年高二下学期2月调研考试数学试题湖北省荆门市钟祥市实验中学2020-2021学年高二下学期5月阶段检测(1)数学试题广东省广州市海珠区2018届高三综合测试(一)数学理试题广东省惠阳高级中学2018届高三上学期12月月考数学(理)试题【全国百强校】湖南省长沙市雅礼中学2019届高三上学期11月份月考数学(理)试题【市级联考】江西省宜春市2019届高三第一学期期末统考理科数学试题2020届吉林省白城四中高三网上模拟考理科数学试题福建省晋江市养正中学2019-2020学年高二上学期第二次月考数学试题(已下线)黄金卷13 【赢在高考·黄金20卷】备战2021年高考数学全真模拟卷(广东专用)
解题方法
2 . 已知
为两条不同的直线,
为两个不同的平面,给出下列4个命题:
其中真命题的序号为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e288596fa3811dd2c17bded60e82e7.png)
①若,则
. ②若
,则
.
③若,
. ④若
,则
.
其中真命题的序号为
A.①② | B.①④ | C.③④ | D.②③ |
您最近一年使用:0次
2018-01-02更新
|
683次组卷
|
9卷引用:湖北省荆门市2018-2019学年高一下学期期末数学试题
湖北省荆门市2018-2019学年高一下学期期末数学试题2015-2016学年湖南省益阳市箴言中学高一12月月考数学试卷福建省莆田第九中学2017-2018学年高一上学期第二次月考(12月)数学试题福建省仙游金石中学2018届高三上学期期中考试数学(文)试题湖南省部分校2021-2022学年高二上学期12月联考数学试题(已下线)2022年全国高考乙卷数学(文)试题变式题20-23题(已下线)2022年全国高考乙卷数学(文)试题变式题9-12题上海市上海大学附属嘉定高级中学2022-2023学年高二上学期开学考试数学试题(已下线)第10章 空间直线与平面(常考、易错必刷30题7种题型专项训练)-【满分全攻略】2023-2024学年高二数学同步讲义全优学案(沪教版2020必修第三册)
名校
解题方法
3 . 在如图所示的正方体
中,
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/31/32983ca5-6221-4f55-b963-adedcf38d3e2.png?resizew=167)
(1)过点C作与面
平行的截面;
(2)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/750058175e99337ed9581237c3246423.png)
(3)若正方体的棱长为2,求四面体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/31/32983ca5-6221-4f55-b963-adedcf38d3e2.png?resizew=167)
(1)过点C作与面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/750058175e99337ed9581237c3246423.png)
(3)若正方体的棱长为2,求四面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c17a08bf4a12ab392df471fe315d02f3.png)
您最近一年使用:0次
2017-09-06更新
|
375次组卷
|
2卷引用:湖北省宜昌市葛洲坝中学2018届高三9月月考数学(文)试题
解题方法
4 . 如图,直三棱柱
中,
,
,
,外接球的球心为
,点
是侧棱
上的一个动点.有下列判断:
① 直线
与直线
是异面直线;②
一定不垂直
;
③ 三棱锥
的体积为定值; ④
的最小值为
.
![](https://img.xkw.com/dksih/QBM/2017/8/30/1763419974787072/1766336092880896/STEM/c5e1f9af-b9bb-4c30-af44-4f385fb61ef5.png?resizew=281)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829018a6ca0aff95d89e3f7cd943274e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
① 直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e516121599c9fcc528121c00afcf52fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce1b066f8869d0ff4513f7a99745125.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
③ 三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02dd76b7dbe2d9ea408dcac787f89d2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f998e8cbd8c96e88a6825bf610021970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://img.xkw.com/dksih/QBM/2017/8/30/1763419974787072/1766336092880896/STEM/c5e1f9af-b9bb-4c30-af44-4f385fb61ef5.png?resizew=281)
其中正确的个数是
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
名校
5 . 如图,在斜三棱柱
中,侧面
与侧面
都是菱形,
,
.
(Ⅰ)求证:
;
(Ⅱ)若
,求平面
与平面
所成的锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee8b5a6dbcf05f572f83f51abf7d668c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea018b2d461bc24d0703fe22f65b655a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82c2b3adb41e8965f553da2e5086a751.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a677b42f8b427b21924a559b90141d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb3edb9e444eb488f867bb22e57ab58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447ead7907c10dad61dd486b66831d87.png)
您最近一年使用:0次
2017-08-24更新
|
814次组卷
|
5卷引用:湖北省荆门市2016-2017学年高二下学期期末质量检测数学(理)试题
解题方法
6 . 如图,已知四边形
和
均为直角梯形,
,
,且
,平面
平面
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/28/3b8302ac-44be-4e25-97c0-036c6af089a7.png?resizew=173)
(1)求证:
;
(2)求证:
平面
;
(3)求几何体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dc1e89746cde967a32168db28e7feec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cc3c947dc4deaf4eb5266772e43bee0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1057fba69b1554ceff580f73dbb28ff3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf9a6db3571fa57bfa2d5e4d44c51b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dc1e89746cde967a32168db28e7feec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d05af5abad97aff40806501f078d0432.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84593a085afa6f9f7afbf92c1ee91e8a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/28/3b8302ac-44be-4e25-97c0-036c6af089a7.png?resizew=173)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffd657e48b15b9b54a55817e2c26b22.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e2fef2c0e49ecae8688ca60802310e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(3)求几何体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc431fe904d0bfcd573c05ebe41fe654.png)
您最近一年使用:0次
解题方法
7 . 如图1,在高为2的梯形
中,
,
,
,过
、
分别作
,
,垂足分别为
、
.已知
,将梯形
沿
、
同侧折起,得空间几何体
,如图2.
![](https://img.xkw.com/dksih/QBM/2017/7/7/1725037203406848/1726250220175360/STEM/fe793d1403db4238b6595ca2026fab09.png?resizew=435)
(1)若
,证明:
为直角三角形;
(2)若
,证明:
平面
;
(3)在(1),(2)的条件下,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b515965c22d2950b592c096c6e3bdfd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4611ceb2a28f7a7e4d24266d7f99b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1ff7bf8ffc8a04186e3e13c1a6d5ced.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/82773737609e65dea3c5c67099f1b10d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/535770901287f244911b42412533d4a9.png)
![](https://img.xkw.com/dksih/QBM/2017/7/7/1725037203406848/1726250220175360/STEM/fe793d1403db4238b6595ca2026fab09.png?resizew=435)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e39b13d187b25461d85a3b8d10c7b678.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/321370fe42bc1216902ea19fbd2a5979.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dced11455b3e31a9090915f80a046fa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c372d059202ec388960b125d4a87dc84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
(3)在(1),(2)的条件下,求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c41ffdaecfb3c73d403179e5745c71a8.png)
您最近一年使用:0次
2017-07-09更新
|
661次组卷
|
3卷引用:湖北省部分重点中学2016-2017学年高一下学期期末考试数学(文)试题
名校
解题方法
8 . 如图,在四棱锥
中,底面为直角梯形,
,
,
垂直于底面
,
,
,
分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/14/0c6f3aff-d0ca-4a2f-acfc-72d0d89125ed.png?resizew=220)
(1)求证:
;
(2)求四棱锥的体积
和截面
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce0d7095ddd69d6ceaf1065b1bc2c79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edf7488ccaf26541626131bceb8f1069.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/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/14/0c6f3aff-d0ca-4a2f-acfc-72d0d89125ed.png?resizew=220)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/962515007ca98ad2d36557b60a42ad6f.png)
(2)求四棱锥的体积
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be54e84508decfcce6d2fcbe6c8c1a92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a406f24b5131eb7da9127750319e52.png)
您最近一年使用:0次
2017-05-13更新
|
620次组卷
|
3卷引用:湖北省长阳县第一高级中学2017-2018学年高二下学期期末考试数学(文)试题
解题方法
9 . 如图,在长方体
中,
,
,点
是线段
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/26/9cc955a8-b8f8-4540-a2b0-928476f9be61.png?resizew=234)
(1)求证:
;
(2)求
点到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7d64fc81c857b124268609a8beb77b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/26/9cc955a8-b8f8-4540-a2b0-928476f9be61.png?resizew=234)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac8079b402caca88f1834ec95b6d6527.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e4755dc59cb5a03cd39879bc80fdbb9.png)
您最近一年使用:0次
名校
解题方法
10 . 如图,在四棱锥
中,底面
为正方形,
底面
,
,过点
的平面与棱
,
,
分别交于点
,
,
(
,
,
三点均不在棱的端点处).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/10/2bf2ebb3-c6bd-4cda-ba06-e09ba32f1ab8.png?resizew=210)
(1)求证:平面
平面
;
(2)若
平面
,求
的值;
(3)直线
是否可能与平面
平行?证明你的结论.
![](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/587df01a98f499a9f361aafd8c3dac39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.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/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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/10/2bf2ebb3-c6bd-4cda-ba06-e09ba32f1ab8.png?resizew=210)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/243fcd0b5e7fc1a4d55e191f5fcbd332.png)
(3)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
2017-04-11更新
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800次组卷
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4卷引用:【全国百强校】湖北省宜昌市第一中学2017-2018学年高一下学期期末考试数学(文)试题
【全国百强校】湖北省宜昌市第一中学2017-2018学年高一下学期期末考试数学(文)试题2017届北京市西城区高三一模文科数学试卷2017届北京市西城区高三4月统一测试(一模)文数试卷(已下线)8.6.3平面与平面垂直 (第2课时) -【上好课】(人教A版2019必修第二册)