1 . 已知正方体
中,
、
分别为
和
的中心,则
和
所成角大小为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.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/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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2 . 设E,F分别是正方体
的棱DC上两点,且
,
,则下列命题为假命题的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4901a7eda97d6a307db76c4fb196ba3d.png)
A.三棱锥![]() | B.异面直线![]() ![]() ![]() |
C.![]() ![]() | D.直线![]() ![]() ![]() |
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3 . 在棱长为2的正方体
中,点
,
,
分别是线段
,线段
,线段
上的动点,且
.则下列说法正确的有( )
![](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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53e97fcdcfd6183b976a61ef3222c607.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/771764b4ccfe35b79337f7ce18331c4b.png)
A.![]() |
B.直线![]() ![]() ![]() |
C.三棱锥![]() |
D.当四棱锥![]() ![]() |
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2024-03-07更新
|
1318次组卷
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5卷引用:广东省深圳市东北师范大学附属中学深圳学校2024届高三下学期3月校内模拟测试数学试题
广东省深圳市东北师范大学附属中学深圳学校2024届高三下学期3月校内模拟测试数学试题江西省新八校2023-2024学年高三上学期第一次联考(期末)数学试题湖南省邵阳市第二中学2023-2024学年高二下学期4月期中考试数学试题(已下线)湖南省长沙市雅礼中学2023-2024学年高一下学期期中考试数学试题变式题11-15(已下线)核心考点5 立体几何中的位置关系 B提升卷 (高一期末考试必考的10大核心考点)
名校
解题方法
4 . 正方形
的边长为2,点
分别是
的中点,如图所示,将正方形沿
折起,使得平面
与平面
垂直,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/14/ab762670-defa-44ac-8a05-11bdbdec4eef.png?resizew=172)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6241f9ef86cd0a902cbadaf336767dbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3163efd660bbfdd899374f9f23e32537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369eb8ad56da7dc1cdb7c43762be4bee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18d5a164bf56f8fb92527ad78bc10ccf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/14/ab762670-defa-44ac-8a05-11bdbdec4eef.png?resizew=172)
A.![]() |
B.异面直线![]() ![]() ![]() |
C.![]() ![]() ![]() |
D.三棱锥![]() ![]() ![]() ![]() ![]() ![]() |
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解题方法
5 . 佛山是全国著名的工业城市,这里生产的部分产品通过水路运输到全国乃至全世界.下图1是佛山一个货运码头的吊机,其作用是完成集装箱的装船或卸船.为了研究其结构的稳固性,工程师把一个吊机的部分结构(图1中圈住部分)画成图2的空间几何体
.若四边形
是矩形,
,
,
,
,
,
,则直线
与
所成角的余弦值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/666734423f1818d76a74f171b7420b68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b92a72e2b717ef70ea4d5c64f8173a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac7c3bffbe68a0b70f084d7be59c4029.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f121646549116bba24e250f3bec6dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4901a7eda97d6a307db76c4fb196ba3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/14/990ee89d-5319-47f4-81c3-c83b2e32082b.png?resizew=319)
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解题方法
6 . 已知底面边长为2的正四棱柱
的体积为
,则直线
与
所成角的余弦为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6093eebca8f3ff82ce9298feb197e955.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2024-02-04更新
|
1003次组卷
|
4卷引用:广东省深圳外国语学校2023-2024学年高一下学期第二次月考数学试题
7 . 如图,在长方体
中,
,
,异面直线
与
所成角的余弦值为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e67b3f4690dc8d3fb60de49755797e17.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267ace52b64e1e7dfc5211e033255b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80e3b64a79d5668efcd92dc98cee255d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e67b3f4690dc8d3fb60de49755797e17.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/16/29d75f01-9476-415b-bcc8-55c291edd967.png?resizew=166)
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2024-01-27更新
|
395次组卷
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3卷引用:广东省湛江市2024届高三上学期1月联考数学试题
8 . 在棱长为2的正方体
中,
,
分别为棱
,
的中点,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
A.直线![]() ![]() |
B.过空间中一点有且仅有两条直线与![]() |
C.过![]() ![]() ![]() ![]() |
D.过直线![]() |
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9 . 如图,在直三棱柱
中,
为
上一点,
为
上一点,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1cfb29a198dc193ba29b03646d5d62c.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/298385f1950bd1712e311c6af3d7dfa3.png)
A.直线![]() ![]() |
B.异面直线![]() ![]() ![]() |
C.![]() |
D.![]() |
您最近一年使用:0次
2024-01-25更新
|
156次组卷
|
3卷引用:广东省高州市2023-2024学年高二上学期期末教学质量监测数学试题
名校
解题方法
10 . 在正方体
的棱长为2,
为
中点,
为
中点,则异面直线
与
所成角的余弦值为_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd694ad3a4733c7c84aaa7946aeea4de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c5b6dfff10cb3dc3e06509db56d7b9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/967e9a89e4b6db4bdd7108d5f7af625d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e883f81c66ceef54d2d0556a68ed585.png)
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2024-01-24更新
|
538次组卷
|
4卷引用:广东省深圳市高级中学2023-2024学年高二上学期期末考试数学试题
广东省深圳市高级中学2023-2024学年高二上学期期末考试数学试题广东省深圳市深圳大学附属中学、龙城高级中学第二次段考2023-2024学年高一下学期5月月考数学试题广东省东莞市东莞中学松山湖学校2023-2024学年高一下学期第二次段考数学试题(已下线)第13章 立体几何初步 单元综合检测(重难点)-《重难点题型·高分突破》(苏教版2019必修第二册)