1 . 如图,平行四边形
中,
,将
沿
翻折,得到四面体
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/25/d37bafd2-e5f2-4a92-a890-c3b581222f59.png?resizew=179)
(1)若
,作出二面角
的平面角,说明作图理由并求其大小;
(2)若
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b58022e20e4bd2a6c25f3f3a2d14fb76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4864c21e9664fa9111ede6425b09563a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/25/d37bafd2-e5f2-4a92-a890-c3b581222f59.png?resizew=179)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26019bbb4d9dbe9052e6761f9cf2eee7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/715cc9ea5e7d80930284ffb117142770.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba267dd0d6ff54f29d9786271e24750a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
2024-01-11更新
|
400次组卷
|
3卷引用:上海市长宁区民办新虹桥高级中学2023-2024学年高二上学期期末考试数学试卷
上海市长宁区民办新虹桥高级中学2023-2024学年高二上学期期末考试数学试卷广东省广州市第六中学2024届高三上学期第一次调研数学试题(已下线)第15讲 8.6.3平面与平面垂直(第2课时)-【帮课堂】(人教A版2019必修第二册)
名校
解题方法
2 . 在长方体
中,底面
是边长为4的正方形,
,过点
作平面
与
分别交于M,N两点,且
与平面
所成的角为
,给出下列说法:
![](https://img.xkw.com/dksih/QBM/2022/7/5/3016088399233024/3016996132487168/STEM/59a23e98b8ba4cb5a36690fa638e3342.png?resizew=255)
①异面直线
与
所成角的余弦值为
;
②
平面
;
③点B到平面
的距离为
;
④截面
面积的最小值为6.
其中正确的是__________ (请填写所有正确说法的编号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d927585a17c2e98ef7d5a9589a26ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9df7fc746f8c4801d8f2f0471ba3297e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://img.xkw.com/dksih/QBM/2022/7/5/3016088399233024/3016996132487168/STEM/59a23e98b8ba4cb5a36690fa638e3342.png?resizew=255)
①异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8459f5f41754890d52b74652ef1f3af1.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/896e293411e2fd0da215ff20781cb36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4508dc6d9c91157836be679c0543cac.png)
③点B到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b0a582c36d62d83c16425b2f54b4354.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e53a3f4fbfdc9d743be259cb8a7b6b2f.png)
④截面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e74395b07e8153a0ef0bbcb5881013f.png)
其中正确的是
您最近一年使用:0次
2022-07-06更新
|
1300次组卷
|
8卷引用:河北省邢台市2021-2022学年高二下学期期末数学试题
3 . 我国古代数学名著《九章算术》中,将底面为直角三角形且侧棱垂直于底面的三棱柱称之为堑堵;将底面为矩形且一侧棱垂直于底面的四棱锥称之为阳马;将四个面均为直角三角形的四面体称之为鳖臑[biē nào].某学校科学小组为了节约材料,拟依托校园内垂直的两面墙和地面搭建一个堑堵形的封闭的实验室
,
是边长为2的正方形.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/45fde4d8-c125-4b27-aef1-9044ed46e1e8.png?resizew=377)
(1)若
是等腰三角形,在图2的网格中(每个小方格都是边长为1的正方形)画出堑堵的三视图;
(2)若
,
在
上,证明:
,并回答四面体
是否为鳖臑,若是,写出其每个面的直角(只需写出结论);若不是,请说明理由;
(3)当阳马
的体积最大时,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9b7b7793d29d66dfdd89e7a6564a35c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/45fde4d8-c125-4b27-aef1-9044ed46e1e8.png?resizew=377)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a543df08305d4a848a980969bb002a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bdcec400a6a9311072505df48fb0fd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f22725912baecf50924d950b915d0156.png)
(3)当阳马
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb1b9bf22bd3ca350a2651a7550e8ba1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
您最近一年使用:0次
2019-12-11更新
|
460次组卷
|
4卷引用:上海市闵行区2018-2019学年高二下学期期末数学试题
上海市闵行区2018-2019学年高二下学期期末数学试题(已下线)专题4.5 简单几何体【压轴题型专项训练】-2020-2021学年高二数学下学期期末专项复习(沪教版)(已下线)第06讲 点面、线面、面面、异面直线的距离(核心考点讲与练)-2022-2023学年高二数学考试满分全攻略(沪教版2020必修第三册)江苏省南通市如皋中学2020-2021学年高一下学期5月月考数学试题
名校
4 . 如图为某一几何体的展开图,其中
是边长为
的正方形,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a21f3055411b6927d08f328da969b017.png)
,点
及
共线.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/11/d1687fa9-e9d9-4985-84e6-39585e4167dd.png?resizew=165)
(1)沿图中虚线将它们折叠起来,使
四点重合,请画出其直观图,试问需要几个这样的几何体才能拼成一个棱长为
的正方体
?
(2)设正方体
的棱
的中点为
,求平面
与平面
所成二面角(锐角)的余弦值.
(3)在正方体
的
边上是否存在一点
,使得
点到平面
的距离为
,若存在,求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a21f3055411b6927d08f328da969b017.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0437348e1bf7c037e7e4904609b9ba2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cec835ef17014181e96cfb481dc72ecc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60e2cbbf7a93719b3196a7d931ef638f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/11/d1687fa9-e9d9-4985-84e6-39585e4167dd.png?resizew=165)
(1)沿图中虚线将它们折叠起来,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4457a029cd930f0052f1c80cfe06d00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
(2)设正方体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69bcb3226e013650b7d8827c31dd41d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(3)在正方体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5105eb24aa12b2163d9c7f50ec1ef2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
您最近一年使用:0次
2019-12-11更新
|
451次组卷
|
4卷引用:上海市上海师大附中2017-2018学年高二下学期期末数学试题
上海市上海师大附中2017-2018学年高二下学期期末数学试题(已下线)专题4.4 空间直线与平面【压轴题型专项训练】-2020-2021学年高二数学下学期期末专项复习(沪教版)上海市向明中学2023-2024学年高二上学期10月月考数学试题上海市闵行区六校2023-2024学年高二上学期期中联考数学试题
名校
解题方法
5 . 如图,正三棱柱
中
为
的中点.
(1)求证:
;
(2)若点
为四边形
内部及其边界上的点,且三棱锥
的体积为三棱柱
体积的
,试在图中画出
点的轨迹,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f483efe20e417feea022e19e1c13020.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/176117b9db64a7ab40048c1ac2f442a9.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e6486784415f3537c9a13556c05d893.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/21/63ae26dd-078a-41e3-a255-45c589628427.png?resizew=180)
您最近一年使用:0次
2018-08-23更新
|
378次组卷
|
4卷引用:【全国百强校】湖南省衡阳市第八中学2017-2018学年高二(实验班)下学期期末结业考试数学(文)试题
【全国百强校】湖南省衡阳市第八中学2017-2018学年高二(实验班)下学期期末结业考试数学(文)试题河南省信阳高级中学2018-2019学年高二上学期开学考试数学试题福建省泉州市2018届高三下学期质量检查(3月)数学(文)试题(已下线)第三章 空间轨迹问题 专题五 微点1 翻折、旋转问题中的轨迹问题【培优版】
6 . 如图所示,在三棱锥
中,
,
,
两两垂直,
,
,点
为
的中点.
(1)若过点
的平面与直线
垂直,分别与棱
,
相交于点
,在图中画出该截面多边形,并说明
点的位置(不要求证明);
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d55095cd1376f1714a918b3f78371db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f656e1d1f68954e5f06de8958f6a9310.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(1)若过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://img.xkw.com/dksih/QBM/2016/3/14/1572538005495808/1572538011222016/STEM/d8149bbb99db4810b0959f60f43a15a1.png?resizew=317)
您最近一年使用:0次
2016-12-04更新
|
1153次组卷
|
4卷引用:2016-2017学年河北省卓越联盟高二上学期月考一数学试卷