1 . 如图,正方形
与正方形
所成角的二面角的平面角的大小是
是正方形
所在平面内的一条动直线,则直线
与
所成角的取值范围是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/15a89aea-4211-45da-98aa-381c81f5d6f1.png?resizew=165)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b312dab930cbbb9a4bb1a99f044dab73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/752b9cde257625b0f92bb7bd71cbac2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b312dab930cbbb9a4bb1a99f044dab73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/15a89aea-4211-45da-98aa-381c81f5d6f1.png?resizew=165)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-06-03更新
|
415次组卷
|
4卷引用:2019年浙江省新高考优化提升卷(一)
解题方法
2 . 已知圆
,则圆的半径为______ ,若
为圆
上任意一点,则
的最小值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e255a19f6f99c1cc7b7d903db780bff0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee82283f06cedef32eb15b87964f5d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cf99adccc80f28343fedd8d0aad7429.png)
您最近一年使用:0次
解题方法
3 . 某空间几何体的三视图如图所示,其体积为
,则该几何体的各个面中最大面的面积为( )
![](https://img.xkw.com/dksih/QBM/2020/5/27/2471777146241024/2472683267522560/STEM/a6d7c3dd54bc4fbd99911a099880220d.png?resizew=179)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://img.xkw.com/dksih/QBM/2020/5/27/2471777146241024/2472683267522560/STEM/a6d7c3dd54bc4fbd99911a099880220d.png?resizew=179)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019高一上·全国·专题练习
4 . 与直线
关于点
对称的直线方程是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1fc37ac7805d65dd49e2e54643e819f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d0924ff22fff9f5639feb0ceeece80d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-05-29更新
|
1027次组卷
|
8卷引用:2019年12月1日《每日一题》必修2-每周一测
(已下线)2019年12月1日《每日一题》必修2-每周一测上海市上海中学2016-2017学年高二上学期期中数学试题河北省元氏县第一中学2019-2020学年高一下学期第三次月考数学试题1989年普通高等学校招生考试数学(文)试题(全国卷)浙江省杭州市临安中学2023-2024学年高二上学期开学考试数学试题江苏省徐州市沛县2023-2024学年高二上学期10月第一次学情调研数学试题(已下线)考点03 对称问题及其应用 2024届高考数学考点总动员【练】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
5 . 如图,四边形
是直角梯形,
,
,
,
,四边形
为正方形.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/9397e4a2-8078-4ace-9e1d-9d39d3731644.png?resizew=135)
(1)若
,求证:
;
(2)若
,求
与平面
所成角的正弦值.
![](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/32bfed41bf1674822a9c7ca82105788c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2eff89502b7b1737ba9c8b77b47d893.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2f3df5713a423887c16e6355236372.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/9397e4a2-8078-4ace-9e1d-9d39d3731644.png?resizew=135)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d25f8eb66299a0f6650c331d4f50d47d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5232ca3c1e0ce4064d0094502aacb063.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e75660cc616c53e0560c8d55b6b651.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2f3df5713a423887c16e6355236372.png)
您最近一年使用:0次
解题方法
6 . 已知某三棱锥的三视图如图所示,其中正视图和俯视图均为等腰直角三角形,则该三棱锥的体积为____________ ,表面积为____________ .
![](https://img.xkw.com/dksih/QBM/2020/5/27/2471765957705728/2472012504236032/STEM/60728d6f4117426186b0c819ed553c2d.png?resizew=158)
您最近一年使用:0次
解题方法
7 . 如图,矩形
垂直于直角梯形
,
,
为
中点,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/06e42bfb-9865-473c-8dbc-7cd44b2322da.png?resizew=212)
(1)求证:
∥平面
;
(2)线段
上是否存在点
,使
与平面
所成角的正切值为
?若存在,请求出
的长;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5de031ade6df38cbc4ccd52cac380c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f5aa0a619cb5e70b47bdf40b91514b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbe7a201432af0a2f9d21c6803906f5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0046177466c78f08d45449dc5639bf38.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/06e42bfb-9865-473c-8dbc-7cd44b2322da.png?resizew=212)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
(2)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cbc32de7999e91000dfd5ab3c16de0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632917e61f4208959686d118c7f19231.png)
您最近一年使用:0次
名校
解题方法
8 . 一正四面体木块如图所示,点
是棱
的中点,过点
将木块锯开,使截面平行于棱
和
,则下列关于截面的说法正确的是( ).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/5d588f64-a045-4f20-8976-3295d29f5b1a.jpg?resizew=177)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd4fce8e923062b9779553d6f282895b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95226c64f0afdaa10b95ec097a0720ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/5d588f64-a045-4f20-8976-3295d29f5b1a.jpg?resizew=177)
A.满足条件的截面不存在 | B.截面是一个梯形 |
C.截面是一个菱形 | D.截面是一个三角形 |
您最近一年使用:0次
2020-05-12更新
|
1106次组卷
|
4卷引用:浙江省台州市三梅中学2020-2021学年高二上学期10月第一次教学检测数学试题
名校
解题方法
9 . 如图,在四边形
中,
,以
为折痕把
折起,使点
到达点
的位置,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/c29e0c78-6351-4c42-9580-dc889bc1491c.png?resizew=141)
(1)证明:
平面
;
(2)若
为
的中点,二面角
等于60°,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aad2d7c7a8177255f745b3b8101b7dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307d38cc7012c328f1f22aa793fe76d7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/c29e0c78-6351-4c42-9580-dc889bc1491c.png?resizew=141)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/715cc9ea5e7d80930284ffb117142770.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f35614aff055b98b76ca262f64e629d.png)
您最近一年使用:0次
2020-05-12更新
|
1706次组卷
|
8卷引用:2020届山东省聊城市高三高考模拟(一)数学试题
解题方法
10 . 在边长为1的正方形中裁去一个如图所示的扇形,再将剩余的阴影部分绕AB旋转一周,所得几何体的表面积为( )
![](https://img.xkw.com/dksih/QBM/2020/4/22/2446938169638912/2447925903114240/STEM/80baf059ff994e0280ae68f756d09f9b.png?resizew=140)
![](https://img.xkw.com/dksih/QBM/2020/4/22/2446938169638912/2447925903114240/STEM/80baf059ff994e0280ae68f756d09f9b.png?resizew=140)
A.3π | B.4π | C.5π | D.6π |
您最近一年使用:0次