名校
1 . 如图,
的二面角的棱上有
两点,直线
分别在这个二面角的两个半平面内,且都垂直于
.已知
,则
的长为
![](https://img.xkw.com/dksih/QBM/2017/8/23/1758303272083456/1759225195667456/STEM/2a15977e57ed4739932ea12ba1b2b169.png?resizew=177)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e77820915779fc650627d94ea2995eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6809772a387d88ed293854985953e88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90cee139b20c3c6e07f100c9f65e48f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab570271ffd4a4f3cce378c26901e209.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c61dcdf54ca2b07fcb8acde1bb511a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://img.xkw.com/dksih/QBM/2017/8/23/1758303272083456/1759225195667456/STEM/2a15977e57ed4739932ea12ba1b2b169.png?resizew=177)
A.![]() | B.7 | C.![]() | D.9 |
您最近一年使用:0次
2017-08-24更新
|
1275次组卷
|
9卷引用:【校级联考】湖南省浏阳一中、醴陵一中2018-2019学年高二12月联考数学(理)试题
【校级联考】湖南省浏阳一中、醴陵一中2018-2019学年高二12月联考数学(理)试题湖北省荆门市2016-2017学年高二下学期期末质量检测数学(理)试题陕西省西安市长安区第一中学2017-2018学年高二上学期第一次月考数学(重点、平行班)试题河南省南阳市第一中学2017-2018学年高二上学期第四次月考数学(理)试题陕西省黄陵中学2017-2018学年高二(普通班)下学期开学考试数学(文)试题湖北省黄石市2019-2020学年高二上学期期末数学试题辽宁省联合校2020-2021学年高二上学期第一次月考数学试题辽宁省葫芦岛市第八高级中学2020-2021学年高二上学期实验班第一次月考数学试题辽宁省大连市第三十六中学2021-2022学年高二上学期10月月考数学试题
2 . 如图,四棱锥
中,平面
平面
,底面
为梯形,
,且
与
均为正三角形,
为
的重心.
![](https://img.xkw.com/dksih/QBM/2017/5/19/1690473527287808/1691631525478400/STEM/55ced9c5cee74e05955037be12c12979.png?resizew=121)
(1)求证:
平面
;
(2)求平面
与平面
所成锐二面角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f8126eff3bb2c4982723d967879e2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e2903ff33266528a7902ad51cf8d75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db5e1441a49e782ff0ef46e776cde06a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e2903ff33266528a7902ad51cf8d75.png)
![](https://img.xkw.com/dksih/QBM/2017/5/19/1690473527287808/1691631525478400/STEM/55ced9c5cee74e05955037be12c12979.png?resizew=121)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf60ad9db3411f35704fa88d86bfef5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15e3189ee19551c4fb5dfe8bd1a73329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
您最近一年使用:0次
2017-05-21更新
|
1104次组卷
|
2卷引用:【全国百强校】湖南省长沙市长郡中学2019届高三下学期第六次月考数学(理)试题
12-13高二上·湖南长沙·期末
名校
解题方法
3 . 如图,在底面为直角梯形的四棱锥P-ABCD中,AD∥BC,∠ABC=90°,PA⊥平面ABCD,PA=3,AD=2,AB=2
,BC=6.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
您最近一年使用:0次
2018-07-21更新
|
830次组卷
|
8卷引用:2011-2012学年湖南省望城县第一中学高二上学期期末考试理科数学试卷
(已下线)2011-2012学年湖南省望城县第一中学高二上学期期末考试理科数学试卷(已下线)2012届江西省会昌中学高三上学期第一次月考理科数学试卷山东省莱州市第一中学高一必修2综合测试数学试题【全国百强校】内蒙古乌兰察布市集宁一中(西校区)2017-2018学年高二下学期期末考试数学(理)试题广东省兴宁市第一中学2020届高三上学期期中段考数学(理)试题湖南省长沙市雅礼中学2022-2023学年高三上学期月考(三)数学试题陕西省西安市西北工业大学附属中学2020-2021学年高二下学期期中理科数学试题广东省茂名市信宜市华侨中学2023-2024学年高二上学期第二次段考(1月)数学试题
4 . 如图,正方体
的棱长为
,
分别为
的中点.
(1)求证:
;
(2)求二面角
的正切值.
![](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/8d52429789f22fe9061973e123a038d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03f5572d9521e112be8148fea4d7241f.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16155b0c208b346e93529385c8793b49.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e74534a54d7271e1b95fd3a74121468b.png)
![](https://img.xkw.com/dksih/QBM/2017/2/16/1625334186016768/1632305636458496/STEM/3ef8953362d0463789f94b1d9d73efde.png?resizew=218)
您最近一年使用:0次
2017-02-26更新
|
473次组卷
|
2卷引用:湖南省长沙市宁乡市2019-2020学年高一下学期期末数学试题
5 . 如图,在四棱锥
中,
平面
,底面
是平行四边形,
,
为
与
的交点,
为棱
上一点.
![](https://img.xkw.com/dksih/QBM/2017/2/16/1625063100178432/1626777178349568/STEM/f7df7ba3bfcc4b569f8537b3c50cb967.png?resizew=188)
(1)证明:平面
平面
;
(2)若
,求二面角
的大小.
![](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/15a5a31a6e5eb13283659cdec9ad727f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/186354626d5a1d13b88dfb4df916947b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83511c460cbd4800bfa13a986c445fea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11cead3a2eeb8d1fad779b04e8464e58.png)
![](https://img.xkw.com/dksih/QBM/2017/2/16/1625063100178432/1626777178349568/STEM/f7df7ba3bfcc4b569f8537b3c50cb967.png?resizew=188)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/677d1863ff4d8ac1604b18149d4f320f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47d669df6c391aa83150df5ae96c39d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5617a404c5a3356753136e5a6b6d51e5.png)
您最近一年使用:0次
2017-02-18更新
|
898次组卷
|
3卷引用:湖南省长沙市第一中学2016-2017学年高一上学期期末考试数学试题
6 . 如图所示,矩形
和矩形
所在平面互相垂直,
与平面
及平面
所成的角分别为
,
,
、
分别为
、
的中点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/6/53eb33c8-f548-42f8-ba17-3ba8c8dfb1c2.png?resizew=129)
(1)求证:
平面
;
(2)求线段
的长;
(3)求二面角
的平面角的正弦值.
![](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/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](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/8ac09dc1ca2cdd7aef28c218763d3e4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.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/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33c096bd244d7e30e8ef26fb5278aac9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/6/53eb33c8-f548-42f8-ba17-3ba8c8dfb1c2.png?resizew=129)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93cf663ee2bf1ac5c43f4306fa0cf250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/370148e9147aa25c60a07ab4ad46e83d.png)
您最近一年使用:0次
名校
解题方法
7 . 已知边长为
的菱形
中,
,沿对角线
折成二面角
为
的四面体
,则四面体
的外接球的表面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f1854ba6cc92481d7a616bd2788a47e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2016-12-04更新
|
526次组卷
|
6卷引用:2017届湖南长沙长郡中学高三摸底考试数学(理)试卷
2017届湖南长沙长郡中学高三摸底考试数学(理)试卷2017届湖南长沙长郡中学高三摸底测试数学(理)试卷安徽省六安市舒城中学2017-2018学年高二下学期第一次统考(开学考试)数学(理)试题【校级联考】江西省南康中学、于都中学2018-2019学年高二上学期第三次月考数学(理)试题(已下线)模块六 立体几何 大招13 外接球之折叠模型(已下线)第三章 折叠、旋转与展开 专题三 球与翻折 微点3 球与翻折综合训练
8 . 如图,边长为2的正方形
中,点
是
的中点,点
是
的中点,将△
、△
分别沿
、
折起,使
、
两点重合于点
,连接
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/4/e7df6667-78af-4a3c-abee-ad72ea879468.png?resizew=381)
(Ⅰ)求证:
;
(Ⅱ)求二面角
的余弦值.
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.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/97a9b32570d553161be04d13954e92a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/646084b7f3902efa4c462ed67599265a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e663220a66eff19da6a71e46b397db2e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/4/e7df6667-78af-4a3c-abee-ad72ea879468.png?resizew=381)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32cbc7f1e43c643372f6d68d33c92acb.png)
(Ⅱ)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f81dbaa7f82b99805eb4e47e3de199e8.png)
您最近一年使用:0次
9 . 如图,在四棱锥
中,底面
是正方形,
底面
,
, 点
是
的中点,
,且交
于点
.
(Ⅰ)求证:
平面
;
(Ⅱ)求证:平面
⊥平面
;
(Ⅲ)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c83f8945042b9c8fb2fbdac9308d62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a93767331e9bac06a564973a9f4fc663.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/defa5b53043ae802bb1af7d14374406d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f04e6ed01c8f3778a64f055d33ee70c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2bc5e50b8dfa02601c70822252854a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/28/d42cc5d6-f31f-49ae-a78c-72125039babb.png?resizew=154)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b30e2f7b22d83bef3421a4ecc7ed4a44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af68a7bf0da4f7c6f739d2e2461ad9b7.png)
(Ⅱ)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cc6f6dfdbe7d39891c35f67e1a95c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1885efcff0b903e314057dd153578600.png)
(Ⅲ)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6772edef04d878a91bf4d7e8419a4628.png)
您最近一年使用:0次
2016-12-03更新
|
1727次组卷
|
3卷引用:2015届湖南省长沙市高考模拟理科数学试卷
10 . 如图,在三棱柱
中,四边形
是边长为4的正方形,平面
平面
,
,
.
(Ⅰ)求证:
平面
;
(Ⅱ)若点
是线段
的中点,请问在线段
是否存在点
,使得
面
?若存在,请说明点
的位置,若不存在,请说明理由;
(Ⅲ)求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7788830ed1cb3b9c5988f70f43595f2e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/37373d5e-5c8a-4bd1-9f27-697c1944b8fc.png?resizew=120)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(Ⅱ)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/063510e3c1fb6a7ccc3b8e3e3c7d660e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(Ⅲ)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2faf01e20ea1759f35ad567c4ed491fa.png)
您最近一年使用:0次
2016-12-03更新
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1136次组卷
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5卷引用:2014-2015学年湖南省浏阳、攸县、醴陵一中高一12月联考数学试卷