1 . 在正四棱锥
中,
,
,E为PA的中点,则异面直线BE与PC所成角的余弦值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea853350b43e0e4dcde21d821f5fbcbe.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2022-01-04更新
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2卷引用:湖南省株洲市第二中学2021-2022学年高二上学期第三次月考数学试卷
2 . 如图,在正方体
中,
分别为
的中点,则下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/2021/12/27/2881550375043072/2882278359908352/STEM/85dbbed2-b076-42df-b031-fa3afce42b6a.png?resizew=173)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a45cb9c1ce80e969f93ad913b8340b8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d6e3e88119c8dba416ec4b5efb59e6.png)
![](https://img.xkw.com/dksih/QBM/2021/12/27/2881550375043072/2882278359908352/STEM/85dbbed2-b076-42df-b031-fa3afce42b6a.png?resizew=173)
A.![]() |
B.![]() ![]() ![]() |
C.![]() ![]() ![]() |
D.点![]() ![]() ![]() |
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名校
3 . 在三棱柱
中,底面
为正三角形,侧棱垂直于底面,
分别是
的中点,
是
的中点.给出下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b199a99e53d67ff4abf233930961a29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eaf6cc58a5a0a64a0e85adbf605dc64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
A.若![]() ![]() ![]() ![]() | B.![]() ![]() |
C.若该三棱柱有内切球,则![]() | D.平面![]() ![]() |
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解题方法
4 . 已知正方体
的棱长为1,点
、
、
分别为棱
、
、
的中点,则下列结论中,正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/d65543fe-2fb7-456b-8323-fa1f8ce3d379.png?resizew=168)
![](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/895dc3dc3a6606ff487a4c4863e18509.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/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/d65543fe-2fb7-456b-8323-fa1f8ce3d379.png?resizew=168)
A.过![]() ![]() ![]() ![]() |
B.![]() ![]() ![]() |
C.异面直线![]() ![]() ![]() |
D.四面体![]() ![]() |
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4卷引用:湖南省常德市临澧县第一中学2021-2022学年高二上学期期中数学试题
解题方法
5 . 图1:平行四边形
中,
,现将
沿
折起,得到三棱锥
(如图2),且
,点M为侧棱
的中点.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52ab924e3692515bd8be4c36472a959a.png)
(2)N为
的角平分线上一点,若
平面
,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29275997e673228f30a3c8262fae3e1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b62d52be7c6e607972b4cf8ccbf58436.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52ab924e3692515bd8be4c36472a959a.png)
(2)N为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a8ec2583c364c079a7b1bfb1e8fe0c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3653ada76ba0c8afe9d57c8e7832c6ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3533837e3d08c461dea031a44e5424d.png)
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2021-10-14更新
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湖南省A佳大联考2021-2022学年高二上学期10月月考数学试题福建省2021-2022学年高二10月联考数学试题(已下线)专题05 空间直线﹑平面的平行-《知识解读·题型专练》(人教A版2019必修第二册)
名校
解题方法
6 . 如图,已知正方形
的边长为
,
为两条对角线的交点,如图所示,将
沿BD所在的直线折起,使得点E移至点C,满足
.
(1)求四面体
的体积
;
(2)请计算:
①直线
与
所成角的大小;
②直线
与平面
所成的角的正弦.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d70676406f26d339465fe3473c0c05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dd5a74a6b39742d1c80302daadfde4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://img.xkw.com/dksih/QBM/2021/10/8/2824808262213632/2826458219020288/STEM/ccf85f2cd72a4ed994a3eeeecbf1136d.png?resizew=177)
(1)求四面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be54e84508decfcce6d2fcbe6c8c1a92.png)
(2)请计算:
①直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
②直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
您最近一年使用:0次
名校
解题方法
7 . 已知圆柱底面半径为
,高为
,
为上底底面的直径,两条母线
,点
是下底底面圆弧上的一个动点.则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c95c0160e73beb94a4a1cbc0168e9a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
A.![]() |
B.该圆柱的内切球体积与该圆柱的体积之比为![]() |
C.三棱锥![]() ![]() |
D.点![]() ![]() ![]() |
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8 . 如图,在正三棱柱
中,各棱长均为2,则下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/905aee1e-7122-4b2c-aa9a-4fb74d25de4f.png?resizew=138)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/905aee1e-7122-4b2c-aa9a-4fb74d25de4f.png?resizew=138)
A.直线![]() ![]() |
B.![]() |
C.异面直线![]() ![]() ![]() |
D.直线![]() ![]() ![]() |
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解题方法
9 . 在正方体
中,
为
的中点,则异面直线
与
所成角的余弦值为( )
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fd4c85bb98a2a0afddd7ed92578ad2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2021-08-12更新
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名校
10 . 如图,在长方体
中,
,
,
,下列说法中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/c12172f3-9398-4f75-a4de-8b09d439c2c4.png?resizew=141)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ea52361458ce2e49ed0fe99d8e6c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f656e1d1f68954e5f06de8958f6a9310.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1192b3111a6dad01bba5227472bb4072.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/c12172f3-9398-4f75-a4de-8b09d439c2c4.png?resizew=141)
A.直线![]() ![]() |
B.平面![]() ![]() |
C.异面直线![]() ![]() ![]() |
D.直线![]() ![]() ![]() |
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