1 . 如图,在正三棱锥
中,
分别为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/8/faad7182-0a6d-48e2-9b88-a44672a510d0.png?resizew=155)
(1)求证:四边形
为矩形.
(2)若四边形
为正方形,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c5471f78107efbfb8bb29aed493cbb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bbd464c5adc6b6450a98f28f545ae2c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/8/faad7182-0a6d-48e2-9b88-a44672a510d0.png?resizew=155)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17dea6aa2b6d8362542af3a7a8d55c08.png)
(2)若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17dea6aa2b6d8362542af3a7a8d55c08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
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名校
解题方法
2 . 在棱长为1的正方体
中,球
以点
为球心,棱
为半径,则平面
被球
截得的区域面积为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7775df7ba0dc94c15e9e706194a463f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
您最近一年使用:0次
名校
3 . 如图,在四棱锥
中,底面
为正方形,
底面
,
,点
为线段
的中点,点
为线段
上的动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/28/547d5c8b-6f6e-4f71-ae8c-54ecb756edca.png?resizew=164)
(1)求证:平面
平面
.
(2)试确定点
的位置,使平面
与平面
所成的锐二面角为
.
![](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/829f9180ddd9aa1a0ee0dc520f4e0b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/28/547d5c8b-6f6e-4f71-ae8c-54ecb756edca.png?resizew=164)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6501f1c913a4ef64957a2f01ab5baa15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)试确定点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09dc1ca2cdd7aef28c218763d3e4d.png)
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2023-11-26更新
|
154次组卷
|
12卷引用:福建省福州市2019-2020学年高三上学期期末质量检测数学(理)试题
福建省福州市2019-2020学年高三上学期期末质量检测数学(理)试题福建省福州华侨中学2023届高三上学期第二次考试数学试题2020届湖南省长沙市长望浏宁四县高三下学期4月联考理科数学试题广东省佛山市第一中学2022届高三上学期12月月考数学试题山东省实验中学2021-2022学年高三下学期3月诊断训练数学试题广西桂林、崇左、贺州、河池、来宾市2022届高三联合高考模拟考试数学(理)试题广东省惠州市(惠阳中山中学、龙门中学、惠州仲恺中学)三校2023届高三上学期第一次质量检测数学试题(已下线)模块三 专题4 大题分类练(立体几何)拔高能力练广东省揭阳市惠来县第一中学2021-2022学年高二下学期第一次段考数学试题河南省南阳市第二中学校2022-2023学年高二上学期12月月考数学试题湖北省宜昌市部分省级示范高中2023-2024学年高二上学期11月月考数学试卷广东省韶关市广东北江实验学校2023-2024学年高二上学期第二次月考(12月)数学试题
23-24高三上·福建·期中
4 . 如图,在四棱锥
中,
为等边三角形,
为
的中点,
,平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/22/e45bb5a3-01f3-4e09-b043-d57738a5b746.jpg?resizew=182)
(1)证明:平面
平面
;
(2)若
,
,
,直线
与平面
所成角的正弦值为
,求三棱锥
的体积.
![](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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/545e18836bc7fee22f8f813a6f525d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/22/e45bb5a3-01f3-4e09-b043-d57738a5b746.jpg?resizew=182)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75463911a178c1425bf65787589ad03d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a9f2a9caa28a5266b12188771c6ace4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f35614aff055b98b76ca262f64e629d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdf91e7449e859f06f73cf6d487d75f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d9d0e698b54e331467bf6c2842ea2ac.png)
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2023·全国·模拟预测
名校
5 . 如图1所示,四边形ABCD中
,
,
,
,
,M为AD的中点,N为BC上一点,且
.现将四边形ABNM沿MN翻折,使得AB与EF重合,得到如图2所示的几何体MDCNFE,其中
.
(1)证明:
平面FND;
(2)若P为FC的中点,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72c4340dcffb0783d118a587e5352a2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7605ce6f221ce8cad191da0f84a216d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd2dcb2121af2b6d4ead458972439308.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/24/2f54442b-3ded-4f7d-a1d3-cfa199fb6ee6.png?resizew=344)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
(2)若P为FC的中点,求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0a3e7730e98d2af874d11664a5d084b.png)
您最近一年使用:0次
2023-11-22更新
|
1340次组卷
|
10卷引用:福建省漳州市诏安县桥东中学(霞葛教学点)2024届高三上学期第二次月考数学试题
福建省漳州市诏安县桥东中学(霞葛教学点)2024届高三上学期第二次月考数学试题(已下线)2024年普通高等学校招生全国统一考试理科数学领航卷(六)(已下线)2024年普通高等学校招生全国统一考试·信息卷理科数学(一)(已下线)2024年普通高等学校招生全国统一考试数学领航卷(八)(已下线)考点12 空间角 2024届高考数学考点总动员【练】青海省西宁市2024届高三上学期期末联考数学(理)试题(已下线)专题15 立体几何解答题全归类(9大核心考点)(讲义)-1宁夏石嘴山市平罗中学2023-2024学年高二上学期第三次月考数学试题(尖子班)吉林省辽源市田家炳高级中学校2023-2024学年高二上学期12月月考数学试题四川省成都市武侯高级中学2023-2024学年高二上学期12月月考数学试题
6 . 一副三角板由两个直角三角形组成,如图所示,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5158a1cea978edcdd6cbaface415bbc.png)
且
,现将两块三角板拼接在一起,得到三棱锥
,取
和
中点
、
,则下列判断中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/15/7d31a959-728e-4f2f-b27d-5c70c9ad202c.png?resizew=319)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5158a1cea978edcdd6cbaface415bbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c1ef93befe86e3115b654cb872d9722.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5adc18ca424552b35ab939e9d57943e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a94c78d07395bd0379acf93e0a334b7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/15/7d31a959-728e-4f2f-b27d-5c70c9ad202c.png?resizew=319)
A.直线![]() ![]() |
B.三棱锥![]() |
C.![]() ![]() |
D.设面![]() ![]() ![]() ![]() |
您最近一年使用:0次
2023-11-15更新
|
644次组卷
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5卷引用:福建省“宁化、永安、尤溪、大田、沙县一中”五校协作2024届高三上学期11月联考数学试题
福建省“宁化、永安、尤溪、大田、沙县一中”五校协作2024届高三上学期11月联考数学试题福建省莆田市第六中学2024届高三上学期1月质检模拟数学试题(已下线)考点17 立体几何中的定值问题 2024届高考数学考点总动员【讲】广东省深圳市福田中学2024届高三上学期第三次月考数学试题(已下线)第二章 立体几何中的计算 专题一 空间角 微点5 直线与平面所成角综合训练【培优版】
7 . 在三棱柱
中,四边形
是菱形,
,平面
平面
,平面
与平面
的交线为l.
(1)证明:
;
(2)已知
上是否存在点
,使
与平面
所成角为
?若存在,求
的长度;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edc50f7febbc2d5d8dcdc23a3630a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce04b35c265cc9c48b60204bd2f718ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a211ad5a06b505b8365a62c1946f3cb7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/3/9c494202-f303-4309-861c-7eaff65f064f.png?resizew=155)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3f35646cb29fafd1e1a214b69e4f22d.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ec9325eb4cf2b1d09d6be7c526cac67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4d781525777c7b5284dffc70b2a28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6655c413f509068d30b165f9d92bdba0.png)
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8 . 在图1中,
,
,
为等边三角形,O为AC边的中点,E在BC边上,且
,沿AC将
进行折叠,使点D运动到点F的位置,如图2,连接FO,FB,FE,
.
(1)证明:
平面ABC.
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb4957406b21df59fdf7fa184752287b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de01ca42a21f0cb44b2c914e092a0d85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c545be1051b20aea348bc99505c27022.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/2/0f9d71fd-47ab-4028-928c-d7a82185fead.png?resizew=298)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/befd9ccddb75aeb71cd1a008669f34da.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7289950468c026d5ceac17a79334dfe9.png)
您最近一年使用:0次
2023-11-10更新
|
501次组卷
|
3卷引用:福建省福州第一中学2024届高三上学期第一学段期中考试数学试题
名校
9 . 如图,在三棱锥
中,
,
底面ABC,若
,M是PB中点,求AM与平面PBC所成角的正切值______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc0da97a7aede49990189a2f3293b382.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/3bd58a64-0aec-4b69-92a6-b4f36c9078f2.png?resizew=159)
您最近一年使用:0次
2023-10-20更新
|
427次组卷
|
3卷引用:福建省南平市邵武市邵武一中2023-2024学年高三上学期10月月考数学试题
福建省南平市邵武市邵武一中2023-2024学年高三上学期10月月考数学试题辽宁省沈阳市第十一中学2023-2024学年高二上学期10月月考数学试题(已下线)第16讲 拓展一:立体几何中空间角的问题和点到平面距离问题-【帮课堂】(人教A版2019必修第二册)
名校
解题方法
10 . 在底面为平行四边形的直棱柱
中,
.
(1)证明:
;
(2)若
,直棱柱
的体积为
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f1e8c67acec768bb1cfe759eae38e2f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/14/94e31c2a-e675-452c-9b33-759a988eb125.png?resizew=130)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/908fdbef8613f4baaeb7524b84c07389.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e2031d209711b058f3d278ede3c1d33.png)
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