名校
解题方法
1 . 在三棱锥
中,
底面
,且
,则该三棱锥外接球的表面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c83f8945042b9c8fb2fbdac9308d62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fa55bf2fa1a9905ce7e2997928c5a1c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-09-22更新
|
1005次组卷
|
4卷引用:江西九江市第一中学2019—2020学年度高二下学期期末考试数学(理科)试题
解题方法
2 . 三棱锥
的底面是以
为斜边的直角三角形,顶点
在底面的射影恰好是
的外心,
,则
与底面
所成角的大小为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dfc5d37e1cd29d660f7019774fa8017.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
A.60° | B.30° | C.45° | D.90° |
您最近一年使用:0次
解题方法
3 . 已知正方体
的棱长是3,点
、
分别是棱
、
的中点,则异面直线
与
所成的角是________ .
![](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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
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4 . 已知圆
与圆
,则两圆的公共弦长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f5d967ad135991b6075ee45df55643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28d95ddc8ea662d115d59e5e144732e9.png)
A.![]() | B.![]() | C.2 | D.1 |
您最近一年使用:0次
2020-09-21更新
|
1225次组卷
|
5卷引用:甘肃省会宁县第二中学2019-2020学年高二下学期期中考试数学(文)试题
甘肃省会宁县第二中学2019-2020学年高二下学期期中考试数学(文)试题(已下线)【南昌新东方】江西省南昌市豫章中学2020-2021学年高二上学期10月月考理科数学试题安徽省皖北县中联盟2021-2022学年高二上学期10月第一次联考数学试题广东省惠州市龙门县高级中学2023-2024学年高二上学期12月月考数学试题(已下线)2.3.4 圆与圆的位置关系(分层练习)-2023-2024学年高二数学同步精品课堂(人教B版2019选择性必修第一册)
5 . 在下列命题中,正确的命题是( )
A.平行于同一直线的两条直线平行; |
B.垂直于同一直线的两条直线平行; |
C.若直线垂直于平面,则它垂直于平面内的所有直线; |
D.垂直于同一个平面的两条直线平行. |
您最近一年使用:0次
2020-09-15更新
|
296次组卷
|
2卷引用:湖南省衡阳市衡阳县四中2020-2021学年高三上学期8月月考数学试题
6 . 如图,三棱柱
中,
平面
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2020/9/13/2549139505209344/2549697087414272/STEM/381fa1f7cfef408d974e4530278c1375.png?resizew=231)
(1)证明:
;
(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/0f61d8d0aaefc3ac491ad3659a2ba2f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4bc3e0ac2677701750f289f6db2a7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af0e44cb429eea46e7ee4320147192b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://img.xkw.com/dksih/QBM/2020/9/13/2549139505209344/2549697087414272/STEM/381fa1f7cfef408d974e4530278c1375.png?resizew=231)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b7852669d7f32cdad2880e22aaf1d5f.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/966b2d5659b3dc130fe0e4b2c0ff0072.png)
您最近一年使用:0次
7 . 如图,等腰直角三角形ABC的直角边
,沿其中位线DE将平面ADE折起,使平面
平面BCDE,得到四棱锥
,设CD,BE,AE,AD的中点分别为M,N,P,Q.
(1)求证:M,N,P,Q四点共面.
(2)求证:平面
平面ACD.
(3)求异面直线BE与MQ所成的角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/209acf15985d1ea1ad86fc4a37e38c0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d28c625d7ac6878957facc8274d459c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5164a3cc47e266446d49127e2ef10c37.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/5/7a8e47b5-c8cd-48fc-89b5-41148b6dcf2a.png?resizew=347)
(1)求证:M,N,P,Q四点共面.
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
(3)求异面直线BE与MQ所成的角.
您最近一年使用:0次
2020-09-06更新
|
2585次组卷
|
5卷引用:高一数学人教A版(2019) 必修第二册 第八章 立体几何 单元测试
高一数学人教A版(2019) 必修第二册 第八章 立体几何 单元测试(已下线)第8章 立体几何初步(单元基础卷)-2021-2022学年高一数学考试满分全攻略(人教A版2019必修第二册)(已下线)9.4 空间角与空间距离(已下线)第8章 立体几何初步(单元测试)-【上好课】2022-2023学年高一数学同步备课系列(人教A版2019必修第二册)河南省郑州市新密市矿区中学2022-2023学年高一下学期5月月考数学试题
8 . 已知梯形
中,
,
,
,
分别是
,
上的点(不包括端点),沿直线
将四边形
翻折成四边形
,设
,
,二面角
的平面角为
,则( )
![](https://img.xkw.com/dksih/QBM/2020/8/26/2536413847330816/2542613455388672/STEM/c81a82279e2c4549b0d3662a0aefc38e.png?resizew=161)
![](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/edbc662cc4dcb32013d472cc7594bb85.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/354ee41dcce9ed93fb835cc6364e8490.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e3c4c86dc1c530dd67af7f0d2d4efd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a28343b452c8c8809d21f9c24fa290b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29b0fad2d681ab4f28db194df47db433.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f435efcc7869eec21bdba1ed81dc3f5.png)
![](https://img.xkw.com/dksih/QBM/2020/8/26/2536413847330816/2542613455388672/STEM/c81a82279e2c4549b0d3662a0aefc38e.png?resizew=161)
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
名校
解题方法
9 . 如图,在直三棱柱
中,
,
,点
,
分别为
和
的中点,
![](https://img.xkw.com/dksih/QBM/2020/8/14/2527907448750080/2540649089556480/STEM/62142fc7-445c-4499-b9d8-337c37cfd562.png)
(1)求证:
平面
;
(2)求证:平面
平面
.
![](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/1baa3d0db9ad31d33c2883a6efed1dc7.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/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://img.xkw.com/dksih/QBM/2020/8/14/2527907448750080/2540649089556480/STEM/62142fc7-445c-4499-b9d8-337c37cfd562.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7592c4f01c8e06c7ee90df5b9413a9f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e53b212640dadf751ef7f65a78a209.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21dee56b9f36ba8f76fe67b76383636b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb304d905125170bebfada27e7ed8960.png)
您最近一年使用:0次
2020-09-01更新
|
724次组卷
|
2卷引用:江苏省扬州市高邮中学2020届高三下学期5月模拟考试数学试题
10 . 已知点
,点A在圆
上,点B在圆
上,若
,则
的最大值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c9dcfd9f4c5298035870cb88a34169.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f5d967ad135991b6075ee45df55643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08227ca941898eb34941f446ca8b1de8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e33c17fa6f3263fbcbe69f8be9be4e5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcd0fd626e6a5d41c21a294247d73a61.png)
您最近一年使用:0次