1 . 如图,平面
平面
,且菱形
与菱形
全等,且
,
为
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/e41d39bc-f4ee-4a1b-aa1b-01599695ca87.png?resizew=177)
(1)求证:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf9a6db3571fa57bfa2d5e4d44c51b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa0230288ef43f4dcbfc0a5d030a4afd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa0230288ef43f4dcbfc0a5d030a4afd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77b258199bda6a24bd425854805c53e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c884b508394b3ab50734b584d9ec783c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/e41d39bc-f4ee-4a1b-aa1b-01599695ca87.png?resizew=177)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a685b86a779499f7b47169b8e9bd068.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1885efcff0b903e314057dd153578600.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0912d666aa93db05c94bb8c0368a9790.png)
您最近一年使用:0次
20-21高一上·全国·课后作业
解题方法
2 . 在如图所示的几何体中,
、
、
分别是
、
、
的中点,
.求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.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/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d60513cfa8e0e96b436194834d738af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96b8c2721ada247b03f41f328539b301.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/2021/1/5/2629780537516032/2630382188437504/STEM/f0ed8fd75dbc4d9a908e45a441f6d0f2.png?resizew=164)
您最近一年使用:0次
名校
解题方法
3 . 在四棱锥
中,底面
为矩形,
平面
,E,F分别为
,
的中点.求证:
![](https://img.xkw.com/dksih/QBM/2021/1/29/2646681624240128/2647424779902976/STEM/7b11c4d4-f2b3-490c-aa9e-e73fa5c622ba.png)
(1)
平面
;
(2)平面
平面
.
![](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/f95475bfc06e884754eb4a455c3f434e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2021/1/29/2646681624240128/2647424779902976/STEM/7b11c4d4-f2b3-490c-aa9e-e73fa5c622ba.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
解题方法
4 . 如图①,在直角梯形ABCP中,AP∥BC,AP⊥AB,AB=BC=
AP,D为AP的中点,E,F,G分别为PC,PD,CB的中点,将△PCD沿CD折起,得到四棱锥P-ABCD,如图②.求证:在四棱锥P-ABCD中,AP
平面EFG.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
您最近一年使用:0次
2021-10-14更新
|
470次组卷
|
9卷引用:人教A版 全能练习 必修2 第二章 第二节 2.2.4 平面与平面平行的性质
人教A版 全能练习 必修2 第二章 第二节 2.2.4 平面与平面平行的性质人教A版(2019) 必修第二册 过关斩将 第八章 8.5. 空间直线、平面的平行 8.5.3 平面与平面平行人教B版 必修2 必杀技 第一章 1.2.2空间中的平行关系课时3 平面与平面平行人教B版(2019) 必修第四册 过关斩将 第十一章 立体几何初步 11.3.3 平面与平面平行人教A版(2019) 必修第二册 必杀技 第8章 8.5.3 平面与平面平行(已下线)考点22 空间几何平行问题(讲解)-2021年高考数学复习一轮复习笔记(已下线)第八章 8.5.3 平面与平面平行(作业)-【上好课】2020-2021学年高一数学同步备课系列(人教A版2019必修第二册)苏教版(2019) 必修第二册 必杀技 第13章 立体几何初步 13.2 基本图形位置关系 13.2.4 平面与平面的位置关系 课时1 两平面平行(已下线)8.5空间直线、平面的平行——课后作业(基础版)
名校
5 . 如图,在四棱锥
中,
底面
,底面
是边长为1的菱形,
,
,
为
的中点,
为
的中点,点
在线段
上,且
.
![](https://img.xkw.com/dksih/QBM/2021/12/18/2875341980663808/2912805677457408/STEM/ae324d00-37e8-4ba5-b126-1968ee4053cd.png?resizew=169)
(1)求证:
平面
;
(2)求
与平面
所成角的正弦值.
![](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/7bb8fb552b9e21dbaba74d11aa747790.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cd5c4f8b106d01e0e431078e1a468b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.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/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6afaa76e94414331574f42873e2b12c3.png)
![](https://img.xkw.com/dksih/QBM/2021/12/18/2875341980663808/2912805677457408/STEM/ae324d00-37e8-4ba5-b126-1968ee4053cd.png?resizew=169)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7a407b262c22419f73396170ecdc849.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
2023高三·全国·专题练习
解题方法
6 . 有两个平行四边形ABCD与ABEF,M为AC上一点,N为BF上一点,且
,求证:
平面CBE.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6b8e876337c054d3c5d43048b744a18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7592c4f01c8e06c7ee90df5b9413a9f5.png)
您最近一年使用:0次
名校
解题方法
7 . 如图,
,
均为
的直径,
所在的平面,
.求证:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/22/79380500-e969-478b-a437-008ffc019daa.jpg?resizew=153)
(1)
;
(2)直线
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee349dce93eb54eaa0a98e29609e6ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac192cfba38bf0e2df0c2d490596aa65.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/22/79380500-e969-478b-a437-008ffc019daa.jpg?resizew=153)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f2bd3555b7a604e1d3c460bfa068adb.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40f44f2b2f82a9126223138972850aa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
您最近一年使用:0次
2021-08-09更新
|
402次组卷
|
2卷引用:江苏省镇江中学2020-2021学年高一下学期5月月考数学试题
8 . 已知正三棱柱
的底面边长为2,点
,
分别为棱
与
的中点.
![](https://img.xkw.com/dksih/QBM/2020/11/21/2597571746922496/2598598526959616/STEM/ce1bbf8a74c64dc38664ee98b376c534.png?resizew=265)
(1)求证:直线
平面
;
(2)若该正三棱柱的体积为
,求直线
与平面
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.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/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://img.xkw.com/dksih/QBM/2020/11/21/2597571746922496/2598598526959616/STEM/ce1bbf8a74c64dc38664ee98b376c534.png?resizew=265)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
(2)若该正三棱柱的体积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b10e8abf8690e4b129466ddb918bcc94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
2020-11-22更新
|
558次组卷
|
2卷引用:山东省潍坊市2020-2021学年高三上学期期中考试数学试题
9 . 如图,AB是圆O的直径.C是圆O上的点,P为平面ABC外一点.设Q为PA的中点,G为
的重心,求证:
平面PBC.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bbf9680f74a9ac5d934304654ce2771.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97ac9afb683291f11a83b416717a5433.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/24/a427690a-5527-4ace-8a86-d9e08defba4a.png?resizew=152)
您最近一年使用:0次
2020-01-31更新
|
530次组卷
|
2卷引用:人教B版(2019) 必修第四册 逆袭之路 第十一章 立体几何初步 11.3.3 平面与平面平行
解题方法
10 . 如图,四边形ABED为梯形,
,
,
平面ABED,M为AD中点
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/8/accf8ca9-6beb-4077-bea1-579074d80c68.png?resizew=239)
(1)求证:平面
⊥平面PBM
(2)探究在PD上是否存在点G,使得
平面PAB,若存在求出G点,若不存在说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64afb6b912d42d3405d9be49521077d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/785f57f0c40632925c12ac31fd27c4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/8/accf8ca9-6beb-4077-bea1-579074d80c68.png?resizew=239)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e6c2dad46a9052a4185a4f7b4ae8a2e.png)
(2)探究在PD上是否存在点G,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1399e7ae0b2decaafc62a5cdffb15522.png)
您最近一年使用:0次