解题方法
1 . 棱长均为1的正三棱锥
中,
分别是棱
的中点,下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a94d59dee2d5a8f0425b64b2083825.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a5f302c1c2f7e1b46cad05594ed672e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/484daa6752e055f12208bf70ce99571f.png)
A.![]() | B.平面![]() ![]() |
C.![]() | D.异面直线![]() ![]() ![]() |
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2 . 在三棱台
中,
底面BCD,
,
,
.若A是BD中点,点P在侧面
内,则直线
与AP夹角的正弦值的最小值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf57ded8dd17c973bb6cdc0e248c036c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8bfe2553e852df73185d017c0a62fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bd6a2b112facda441f4e34bf5c145fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5065574d869681249e5aca3cd5a02d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b24e120b14d76a6ad877ac67ba8887f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2bf9ef324f1289e205e29fed105c38e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2eb89294b31ffdd2680b4361e8994d7.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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3 . 在正方体
中,点P在线段
上运动,则下列结论正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
A.直线![]() ![]() |
B.三棱锥![]() |
C.异面直线![]() ![]() ![]() |
D.直线![]() ![]() ![]() |
您最近一年使用:0次
2021-12-10更新
|
752次组卷
|
2卷引用:浙江省台州市十校联盟2021-2022学年高二上学期期中联考数学试题
4 . 如图,在菱形
中,
,
,
为
的中点,将
沿
翻折成
,接
和
,
为
的中点,则在翻折过程中,下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/19/14267ca1-0904-4d00-92f6-8fef85832777.png?resizew=269)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a5e0a51c9e14fb246b0ba0b231c1e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84e054544e4ece645f5e06c9d24a8b64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87cdc08e1c4a04a18d5ecea03393e36d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87cdc08e1c4a04a18d5ecea03393e36d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/19/14267ca1-0904-4d00-92f6-8fef85832777.png?resizew=269)
A.![]() | B.![]() ![]() ![]() |
C.三棱锥![]() ![]() | D.线段![]() |
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解题方法
5 . 如图,棱长为2的正方体
中,
、
分别为棱
、
的中点,
为面对角线
上一个动点,则下列选项中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/31/fd96dbfb-19a1-4fa5-afc6-9c30c26468a8.png?resizew=255)
![](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/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/31/fd96dbfb-19a1-4fa5-afc6-9c30c26468a8.png?resizew=255)
A.三棱锥![]() ![]() |
B.存在![]() ![]() ![]() ![]() |
C.![]() ![]() ![]() ![]() ![]() |
D.若平面EFG与棱AB,BC有交点,记交点分别为M,N,则![]() ![]() |
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2021-11-03更新
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1587次组卷
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5卷引用:浙江省杭州市桐庐中学2021-2022学年高二上学期10月阶段性测试数学试题
浙江省杭州市桐庐中学2021-2022学年高二上学期10月阶段性测试数学试题浙江省绍兴市诸暨中学2021-2022学年高二(平行班)上学期期中数学试题(已下线)收官卷04--备战2022年高考数学一轮复习收官卷(新高考地区专用)浙大附中玉泉、丁兰2022-2023学年高二上学期期中数学试题浙江省武义第一中学2023-2024学年高二上学期11月检测1数学试题
名校
6 . 如图(1)是一副直角三角板.现将两个三角板沿它们的公共边翻折成图(2)的四面体
,设
,
与面
所成角分别为
,
,在翻折的过程中,下列叙述正确的是( )
![](https://img.xkw.com/dksih/QBM/2021/10/9/2825575199817728/2828531898515456/STEM/5730fc01a7a04cdd91a591de1cd31992.png?resizew=541)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://img.xkw.com/dksih/QBM/2021/10/9/2825575199817728/2828531898515456/STEM/5730fc01a7a04cdd91a591de1cd31992.png?resizew=541)
A.存在某个位置使得![]() |
B.若![]() ![]() ![]() |
C.当![]() ![]() ![]() ![]() |
D.异面直线![]() ![]() ![]() |
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2021-10-13更新
|
852次组卷
|
5卷引用:浙江省精诚联盟2021-2022学年高二上学期10月联考数学试题
解题方法
7 . 以下五个命题,真命题的有_______ .(填上全部真命题的序号)
(1)垂直于同一直线的两条直线互相平行;
(2)若
、
是异面直线,则一定存在平面
过
且与
平行;
(3)若平面
内有不在同一直线的三点
、
、
到平面
的距离都相等,则
;
(4)分别位于两个给定的不同平面
、
内的两条直线
、
一定是异面直线;
(5)已知直线
、
和平面
,
不在
内,
在
内,若
,则
平行
.
(1)垂直于同一直线的两条直线互相平行;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(3)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/384a65ca1ee3d7d86b988ca34c885e18.png)
(4)分别位于两个给定的不同平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(5)已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ff4e42856fa5f6a4e12993e53b065e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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解题方法
8 . 已知矩形
中,
,
,
为线段
上一点(不在端点),沿线段
将
折成
,使得平面
平面
.
![](https://img.xkw.com/dksih/QBM/2021/6/22/2748470738575360/2782575554150400/STEM/7aa415d10a144504b48656715b5eabfe.png?resizew=338)
(1)证明:平面
与平面
不可能垂直;
(2)若二面角
大小为60°,
(ⅰ)求直线
与
所成角的余弦值;
(ⅱ)求三棱锥
的外接球的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68696b781af2609327222d22cb7bab3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58ebf8aa867ccca195ec94c3c96e9b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/2021/6/22/2748470738575360/2782575554150400/STEM/7aa415d10a144504b48656715b5eabfe.png?resizew=338)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae9bd3db15b3c5062240b4438fe6476.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e95fa1c3bcd3d0464fcadf248e90ace.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4c35e8cf7b77cda3a23aaca62cd937f.png)
(ⅰ)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9b123ae31090740589ba27a846620b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(ⅱ)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c586b72a984e1fd9082b9f02ef7f3e91.png)
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解题方法
9 . 某演讲比赛冠军奖杯由一个水晶球和一个金属底座组成(如图①).已知球的体积为
,金属底座是由边长为4的正三角形
沿各边中点的连线向上垂直折叠而围成的几何体(如图②),则( )
![](https://img.xkw.com/dksih/QBM/2021/6/21/2747912123908096/2782008720482304/STEM/6b42e917dff94dcc8eb42291374ddd70.png?resizew=426)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67fb457e8ac0d3ac35e1c668ea138f91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/2021/6/21/2747912123908096/2782008720482304/STEM/6b42e917dff94dcc8eb42291374ddd70.png?resizew=426)
A.![]() ![]() ![]() ![]() |
B.经过![]() ![]() ![]() ![]() |
C.直线![]() ![]() ![]() |
D.奖杯整体高度为![]() |
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解题方法
10 . 已知三棱柱
中,棱长均为
,顶点
在底面
上的射影恰为
的中点
,
为
的中点,则直线
与直线
所成角的余弦值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://img.xkw.com/dksih/QBM/2021/6/24/2750005077688320/2781071884288000/STEM/a108ec1d-4115-45c0-9e0b-35de727577b8.png?resizew=233)
您最近一年使用:0次
2021-08-07更新
|
1400次组卷
|
5卷引用:浙江省宁波市九校2020-2021学年高一下学期期末联考数学试题
浙江省宁波市九校2020-2021学年高一下学期期末联考数学试题浙江省温州市瑞安市第六中学2021-2022学年高一下学期5月月考数学试题(已下线)第09讲 空间点、直线、平面之间的关系(核心考点讲与练)-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)第02讲 基本图形的位置关系(3)(已下线)专题04 立体几何初步(1)-【常考压轴题】