名校
解题方法
1 . 已知两个平面,两条直线
,则下列命题正确的是( )
A.若![]() ![]() ![]() |
B.若![]() ![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
2023-12-30更新
|
341次组卷
|
6卷引用:四川省宜宾市2023届高三三模数学(文科)试题
四川省宜宾市2023届高三三模数学(文科)试题四川省宜宾市2023届高三三模数学(理科)试题(已下线)第03讲 空间中平行、垂直问题10种常见考法归类(3)重庆市二0三中学校2023-2024学年高二上学期开学考试数学试题(已下线)北京市第五十五中学2023-2024学年高二上学期期末模拟数学试题(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)
2 . 如图所示,
是正三角形,
平面
,
,
,
,且F为
的中点.
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/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3af4a9a466a3b1a794f6190c860806de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/317888e19b25197c633acd44eb855f85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037b342a682cbd4241855a243da3c016.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a2b5cfae407016cad45bbdefea05833.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
3 . 如图,在四棱锥
中,底面
是梯形,
,
,
,
为等边三角形,
为棱
的中点.
(1)证明:
平面
;
(2)当
=
时,求证:平面
⊥平面
,并求点
与到平面
的距离.
![](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/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d8c12a6be7d9ec81631aca2c2b5074a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7fbd6b9f85c086ac95562fe45e8d969.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/25/3aa58be3-f1be-40a5-83f7-df471a698468.png?resizew=155)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d27ff0b39832f094ec51e28721d739.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
2023-05-23更新
|
968次组卷
|
3卷引用:四川省宜宾市叙州区第二中学校2024届高三一模数学(文)试题
解题方法
4 . 如图(1),在边长为
的正三角形ABC中,D,E分别为AB,AC中点,将
沿DE折起,使二面角
为直二面角,如图(2),连接AB,AC.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/3/7d9729bf-a30a-4ed1-b5b5-bf0c31c32269.png?resizew=345)
(1)求四棱锥
的体积;
(2)在图(2)中,过点E作平面EFG与平面ABD平行,分别交BC,AC于F,G.求证:
平面ABC.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/370148e9147aa25c60a07ab4ad46e83d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/3/7d9729bf-a30a-4ed1-b5b5-bf0c31c32269.png?resizew=345)
(1)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8e7cedc39297d66dbb177f2a1f6bee2.png)
(2)在图(2)中,过点E作平面EFG与平面ABD平行,分别交BC,AC于F,G.求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1d0df73a49d4348a5c1e3aaa149cc8a.png)
您最近一年使用:0次
名校
5 . 如图,四棱锥P﹣ABCD的底面是等腰梯形,AD∥BC,BC=2AD,
,E是棱PB的中点,F是棱PC上的点,且A、D、E、F四点共面.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/20/471c4c9b-216e-461d-b819-0fb9bd6e8383.png?resizew=228)
(1)求证:F为PC的中点;
(2)若△PAD为等边三角形,二面角
的大小为
,求直线BD与平面ADFE所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/20/471c4c9b-216e-461d-b819-0fb9bd6e8383.png?resizew=228)
(1)求证:F为PC的中点;
(2)若△PAD为等边三角形,二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c911b404bbb8f8d5f1470585fa31ad97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
您最近一年使用:0次
2022-06-16更新
|
1363次组卷
|
4卷引用:四川省宜宾市兴文县兴文第二中学校2024届高三一模数学(理)试题
6 . 如图,在四棱锥
中,底面
为直角梯形,
,
,
,平面
平面
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/fa2659cf-c5f3-4a72-8650-434be07285c0.png?resizew=243)
(1)证明:
平面
;
(2)求平面
与平面
所成锐二面角的余弦值.
![](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/4db335d71f1cd3514a99faa896dfded6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/533865d9ae72af3a022cce4dfa3f907b.png)
![](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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/fa2659cf-c5f3-4a72-8650-434be07285c0.png?resizew=243)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/982d01f052709b72afeaf1015fc7acc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
解题方法
7 . 如图,在四棱锥
中,底面
为直角梯形,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0bfa7955ba2d721172673682281df42.png)
,
,平面
平面
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/2022/5/9/2975774629707776/2976656776462336/STEM/60b2be64381d453e86a9ba03adf17fe3.png?resizew=258)
(1)证明:
平面
;
(2)求多面体
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/d39681bd16fa20a6616da67aab6d95ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0bfa7955ba2d721172673682281df42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0204f76cda5ea4ced714588be1efeaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/2022/5/9/2975774629707776/2976656776462336/STEM/60b2be64381d453e86a9ba03adf17fe3.png?resizew=258)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa14afe6f0aad22e8e869c39a60be657.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)求多面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64198065b66a9a3491f8e48fc8b9d2ee.png)
您最近一年使用:0次
8 . 如图,四棱锥P-ABCD的底面为菱形,
,AB=AP=2,PA⊥底面ABCD,E是线段PB的中点,G,H分别是线段PC上靠近P,C的三等分点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/29/6e51da1d-5ca9-44f3-bc7b-7708e5560ccf.png?resizew=284)
(1)求证:平面AEG∥平面BDH;
(2)求点A到平面BDH的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b96fac11d72f72c805dbddb8da72d68.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/29/6e51da1d-5ca9-44f3-bc7b-7708e5560ccf.png?resizew=284)
(1)求证:平面AEG∥平面BDH;
(2)求点A到平面BDH的距离.
您最近一年使用:0次
2022-04-27更新
|
1272次组卷
|
5卷引用:四川省宜宾市叙州区第二中学校2022-2023学年高三上学期期末考试数学(文)试题
9 . 如图,在正四棱柱
中,
是线段
上的动点,有下列结论:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/922ee2e1-e20f-4f45-a1b5-3d5cb1ae6b25.png?resizew=151)
①
;
②
,使
;
③三棱锥
体积为定值;
④三棱锥
在平面
上的正投影的面积为常数.
其中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/922ee2e1-e20f-4f45-a1b5-3d5cb1ae6b25.png?resizew=151)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52ab924e3692515bd8be4c36472a959a.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ed1178b2add167a048b1ff7ab7712de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb88ba49607e90d5b1ddf625e2cf7e3.png)
③三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62382b7ef29453a5c07151c262e05311.png)
④三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62382b7ef29453a5c07151c262e05311.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
其中正确的是( )
A.①②③ | B.①③ |
C.②③④ | D.①④ |
您最近一年使用:0次
2022-04-01更新
|
525次组卷
|
2卷引用:四川省宜宾市2022届高三第二次诊断测试数学(文)试题
名校
10 . 如图1,在等边
中,点D,E分别为边AB,AC上的动点且满足
,记
.将△ADE沿DE翻折到△MDE的位置并使得平面MDE⊥平面DECB,连接MB,MC得到图2,点N为MC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/15/3055290b-2399-45ed-b013-146beaec5294.png?resizew=260)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/15/2e3fae98-1e62-4621-b770-07739327acb0.png?resizew=270)
(1)当EN∥平面MBD时,求λ的值;
(2)试探究:随着λ值的变化,二面角BMDE的大小是否改变?如果改变,请说明理由;如果不改变,请求出二面角
的正弦值大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e210c9698063925ad2df6b6c1749571.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7404b3c8bef0235e05608c04df6e5335.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/15/3055290b-2399-45ed-b013-146beaec5294.png?resizew=260)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/15/2e3fae98-1e62-4621-b770-07739327acb0.png?resizew=270)
(1)当EN∥平面MBD时,求λ的值;
(2)试探究:随着λ值的变化,二面角BMDE的大小是否改变?如果改变,请说明理由;如果不改变,请求出二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6306a5c48c6a2b30eb0c6548c1b99ee.png)
您最近一年使用:0次
2022-06-13更新
|
2907次组卷
|
15卷引用:四川省宜宾市叙州区第二中学校2023届高三二诊模拟理科数学试题
四川省宜宾市叙州区第二中学校2023届高三二诊模拟理科数学试题湖南省长沙市长郡中学2021届高三下学期一模数学试题四川省泸县第二中学、泸县二中实验学校2022届高三上学期一诊模拟考试数学(理)试题四川省成都市第七中学2022届高三理科数学押题卷(预测卷)(已下线)第06讲 向量法求空间角(含探索性问题) (讲)-2福建省福州市屏东中学2023届高三上学期开学考试数学试题(已下线)7.5 空间向量求空间角(精练)(已下线)考向28利用空间向量求空间角(重点)(已下线)模拟卷01辽宁省葫芦岛市兴城高级中学2022-2023学年高三上学期期末数学试题湖南省常德市汉寿县第一中学2024届高三上学期12月月考数学试题湖南省常德市安乡县第一中学2024届高三上学期12月月考数学试题(已下线)第一章 空间向量与立体几何综合测试-2022年暑假高一升高二数学衔接知识自学讲义(人教A版2019)河南省信阳高级中学2021-2022学年高二下学期期末考试数学(理科)试题江西省宜春市丰城市第九中学2023-2024学年高一上学期期末数学试题