名校
1 . 已知正方形
的边长是4,将
沿对角线
折到
的位置,连接
.在翻折过程中,下列结论错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3f6bf45ecba77a2581e1142bd16bf8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab41cce6eb2d3058a644314865d16548.png)
A.![]() ![]() |
B.三棱锥![]() ![]() |
C.当二面角![]() ![]() ![]() |
D.三棱锥![]() ![]() |
您最近一年使用:0次
2020-07-31更新
|
395次组卷
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4卷引用:湖北省恩施州2019-2020学年高二下学期期末数学试题
湖北省恩施州2019-2020学年高二下学期期末数学试题安徽省名校2019-2020学年高一下学期期末联考数学试题河南省许昌实验中学2020-2021学年高二下学期期末数学(理科)试题(已下线)1.3.1 柱体、锥体、台体的表面积与体积-2020-2021学年高一数学课时同步练(人教A版必修2)
名校
解题方法
2 . 在四棱锥
中,
平面
,底面
为菱形,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/7e142eff-f298-4811-b712-88f3705e29d9.png?resizew=210)
(1)证明:
平面
.
(2)若
,且
的面积为
.求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eee296a7d9fba487f1485c61580196f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/7e142eff-f298-4811-b712-88f3705e29d9.png?resizew=210)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81d5974e8669eb588401203de18a3ff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/983add910c8e09954f164a5e87d1f7fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d876c494a89de1b52f19d07b362106c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
您最近一年使用:0次
2020-07-09更新
|
560次组卷
|
3卷引用:湖北省十堰市2019-2020学年高一下学期期末数学试题
湖北省十堰市2019-2020学年高一下学期期末数学试题河北省博野中学2019-2020学年高一下学期入学考试数学试题(已下线)第六章 立体几何初步(能力提升)-2020-2021学年高一数学单元测试定心卷(北师大2019版必修第二册)
名校
解题方法
3 . 在三棱柱
中,
平面
,
,
,
分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/78da8751-e601-4a3a-b6ca-a236006c36ca.png?resizew=154)
(1)证明:
平面
.
(2)证明:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/78da8751-e601-4a3a-b6ca-a236006c36ca.png?resizew=154)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f306ff6d237cd9d847aa109acf9333d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db3ef97d64e58d311019b70fe5e2cc0d.png)
您最近一年使用:0次
2020-07-09更新
|
791次组卷
|
3卷引用:湖北省十堰市2019-2020学年高一下学期期末数学试题
名校
4 . 如图,直三棱柱
中,
,
,
,
分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/04995d23-7b87-42b4-af22-6ed033682091.png?resizew=163)
(1)证明:
平面
;
(2)已知
与平面
所成的角为30°,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/883fc5e3faf39829d60804b59deb1730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/04995d23-7b87-42b4-af22-6ed033682091.png?resizew=163)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2319d234a0586478d4e73020d48b3a10.png)
您最近一年使用:0次
2020-05-13更新
|
2758次组卷
|
16卷引用:湖北省襄阳市2019-2020学年高二上学期期末数学试题
湖北省襄阳市2019-2020学年高二上学期期末数学试题湖北省宜昌市天问高中2019-2020学年高二(下)开学数学试题2020届黑龙江省实验中学高三上学期期末考试数学(理)试题【市级联考】辽宁省丹东市2019届高三总复习质量测试(一)理科数学试题四川省广安市广安中学2019-2020学年高二9月月考(文)数学试题黑龙江省鹤岗市第一中学2019-2020学年高三上学期10月月考数学(理)试题江西省吉安市2019-2020学年高三上学期期中数学(理)试题江西省宜春市上高县第二中学2019-2020学年高三上学期11月月考数学(理)试题2020届河北省衡水中学高三年级上学期五调考试数学(理科)试题四川省棠湖中学2019-2020学年高三下学期第二次月考数学(理)试题(已下线)专题01 平行、垂直问题的证明(第三篇)-备战2020年高考数学大题精做之解答题题型全覆盖山东济南市历城第二中学2019-2020学年高一下学期开学考试数学试题江苏省无锡市江阴市高级中学2019-2020学年高二下学期期中数学试题2020届河北省衡水中学高三高考考前密卷(一)数学(理)试题人教B版(2019) 选择性必修第一册 过关斩将 第一章 空间向量与立体几何 1.2 空间向量在立体几何中的应用 1.2.4 二面角甘肃省永昌县第一中学2020-2021学年高三上学期第一次月考数学理试题
解题方法
5 . 如图,已知正三棱柱
的高为3,底面边长为
,点
分别为棱
和
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/a53d2f48-1912-4d0d-9483-41073d0f3f7c.png?resizew=152)
(1)求证:直线
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/a53d2f48-1912-4d0d-9483-41073d0f3f7c.png?resizew=152)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d682fd0344452998187cb6d48de3dd1.png)
您最近一年使用:0次
6 . 四棱锥
中,底面
是中心为
的菱形,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/806310d8-b25d-4a1f-b262-d274287d2dc1.png?resizew=187)
(1)求证:
平面
;
(2)若直线
与平面
所成的角为
,求二面角
正弦值.
![](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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30ea888720ff32b0d741daa5d0becd46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bbd7c2767c106faf27d6a97ebc8e739.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/806310d8-b25d-4a1f-b262-d274287d2dc1.png?resizew=187)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1069d514c3c32aeabd274475ee209ed6.png)
您最近一年使用:0次
7 . 在四棱锥
中,底面
是等腰梯形,其中
∥
,若
,
,且侧棱与底面
所成的角均为45°,则该棱锥的体积为_________ .
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e921f46d90e43f4517c55832b6280f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
名校
解题方法
8 . 如图,在四棱柱
中,
平面
,底面ABCD满足
∥BC,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/effdeab01e845277aa6f1c1475fb7640.png)
![](https://img.xkw.com/dksih/QBM/2020/4/5/2435008730226688/2435850537476096/STEM/a83af5db-7185-4eec-b7b0-adb91ab5daa1.png)
(Ⅰ)求证:
平面
;
(Ⅱ)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/effdeab01e845277aa6f1c1475fb7640.png)
![](https://img.xkw.com/dksih/QBM/2020/4/5/2435008730226688/2435850537476096/STEM/a83af5db-7185-4eec-b7b0-adb91ab5daa1.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
(Ⅱ)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b0a582c36d62d83c16425b2f54b4354.png)
您最近一年使用:0次
2020-04-06更新
|
1520次组卷
|
21卷引用:湖北省鄂州市2021-2022学年高二上学期期末数学试题
湖北省鄂州市2021-2022学年高二上学期期末数学试题2020届北京市西城区高三第一次模拟考试数学试题2020届宁夏石嘴山市高三4月二模数学(理)试题(已下线)专题04 立体几何-2020年高三数学(理)3-4月模拟试题汇编陕西省渭南市韩城市2020届高三(6月份)高考数学(理科)模拟试卷宁夏石嘴山市2020届高三适应性测试数学(理)试题(已下线)专题16 立体几何-2020年高考数学母题题源解密(北京专版)(已下线)专题18 立体几何综合-2020年高考数学(理)母题题源解密(全国Ⅰ专版)(已下线)专题8.9 空间向量与立体几何单元测试卷-2021年新高考数学一轮复习学与练陕西省安康市2021-2022学年高二下学期期末理科数学试题陕西省汉中市2021届高三上学期第一次校际联考理科数学试题重庆市万州第二高级中学2021-2022学年高二上学期第一次月考数学试题山东省济宁市邹城市第二中学2021-2022学年高二上学期10月月考数学试题黑龙江省大庆市大庆铁人中学2021-2022学年高二上学期第一次月考数学试题北京市房山区良乡中学2022届高三上学期期中考试数学试题湖南省邵阳市邵东市第一中学2021-2022学年高二上学期期中数学试题河北省石家庄市二十三中2022-2023学年高二上学期第一次月考数学试题陕西省榆林市绥德中学2023届高三上学期第二次模拟考试理科数学试题浙江省绍兴蕺山外国语学校2022-2023学年高二上学期10月检测数学试题福建省永安市第九中学2022-2023学年高二上学期9月月考数学试题河南省洛阳市新安县第一高级中学2022-2023学年高二上学期9月月考数学试题
名校
9 . 四棱锥S-ABCD中,底面ABCD为平行四边形,侧面
底面ABCD,已知
,
为正三角形.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/69822833-d4e4-4e2f-8606-fda0fd0e9a86.png?resizew=197)
(1)证明
.
(2)若
,
,求二面角
的大小的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b6e6192cf24ada791c26c2d6d434069.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c42ed2e5bd5a0f033e24008697bf4963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72e49817548cb45b3d1e58570644c6fc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/69822833-d4e4-4e2f-8606-fda0fd0e9a86.png?resizew=197)
(1)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4e7c18f9db65fcd840b39d7bbd3028c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1ac2e11788860424508ea9e80cf89d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c90adb28e2332fb7cb1e02cf00fac44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e027dbb6588cfd0db32f183caeba4972.png)
您最近一年使用:0次
10 . 如图,在长方体
中,
,
,
,E、F分别为棱
、
的中点.动点P在长方体的表面上,且
,则点P的轨迹的长度为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a88c44f558705de3bcefcfc0ece96b8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
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2020-03-27更新
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987次组卷
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3卷引用:湖北省宜昌市天问高中2019-2020学年高二(下)开学数学试题