1 . 正方体
的棱长为4,
,
,用经过
,
,
三点的平面截该正方体,则所截得的截面面积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/31/45a43a6c-dff3-47d2-af2e-339f497cd59f.png?resizew=158)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72545fe29c470b406debfb30d4d9f361.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52b9c8190e1a489a9c611959fa971f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/31/45a43a6c-dff3-47d2-af2e-339f497cd59f.png?resizew=158)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
2 . 已知正三棱锥
的底面是边长为3的正三角形,其外接球O的表面积为
,且点A到底面
的距离小于外接球O的半径,E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/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95345846d2dd4dfa042a9093c62a8b82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
您最近一年使用:0次
3 . 如图,在正方体
中,点
、
分别是棱
、
上的动点.、给出下面四个命题,其中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/1df876c3-ce71-4ac2-9bec-6bd77a465ba9.png?resizew=164)
![](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/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/1df876c3-ce71-4ac2-9bec-6bd77a465ba9.png?resizew=164)
A.![]() |
B.直线![]() ![]() ![]() |
C.若直线![]() ![]() ![]() |
D.若直线![]() ![]() ![]() ![]() |
您最近一年使用:0次
2021-08-04更新
|
411次组卷
|
2卷引用:福建省三明市2020-2021学年高一下学期期末数学试题
名校
4 . 已知
,
表示两条不同的直线,
,
,
表示三个不同的平面,则下列命题不正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](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/9f435efcc7869eec21bdba1ed81dc3f5.png)
A.若![]() ![]() ![]() | B.若![]() ![]() ![]() |
C.若![]() ![]() ![]() | D.若![]() ![]() ![]() |
您最近一年使用:0次
2021-08-03更新
|
302次组卷
|
2卷引用:福建省南平市2020-2021学年高一下学期期末数学试题
解题方法
5 . 如图,在棱长为2的正方体
中,
,
,
,
分别为
,
,
,
的中点,点
为线段
上的动点,且
.
![](https://img.xkw.com/dksih/QBM/2021/7/8/2759898787160064/2778264566128640/STEM/5f2d6e941fa345d5a6ed8508d4498d6e.png?resizew=155)
(1)是否存在
使得
平面
,若存在,求出
的值并给出证明过程;若不存在,请说明理由;
(2)画出平面
截该正方体所得的截面,并求出此截面的面积.
![](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/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faf7d52ab2f7e07f0a451a35ac23e22a.png)
![](https://img.xkw.com/dksih/QBM/2021/7/8/2759898787160064/2778264566128640/STEM/5f2d6e941fa345d5a6ed8508d4498d6e.png?resizew=155)
(1)是否存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5311bb2a8564c3ff0d683d443633f746.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe8a84ca3a13f82aff1a022edc66065.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(2)画出平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe8a84ca3a13f82aff1a022edc66065.png)
您最近一年使用:0次
2021-08-03更新
|
817次组卷
|
5卷引用:福建省南平市2020-2021学年高一下学期期末数学试题
福建省南平市2020-2021学年高一下学期期末数学试题福建省安溪一中、养正中学、惠安一中、泉州实验中学2021-2022学年高一下学期期中数学试题(已下线)专题8.4 直线、平面平行的判定及性质(练)- 2022年高考数学一轮复习讲练测(新教材新高考)(已下线)8.5 空间直线、平面的平行(精练)-2021-2022学年高一数学一隅三反系列(人教A版2019必修第二册)(已下线)8.5.3平面与平面平行(练案)-2021-2022学年高一数学同步备课 (人教A版2019 必修第二册)
6 . 设m,n是两条不同的直线,,是两个不同的平面,则下列命题正确的是( )
A.若![]() ![]() ![]() ![]() |
B.若![]() ![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() |
您最近一年使用:0次
名校
7 . 如图,已知正四棱锥
与正四面体
所有的棱长均为
.
![](https://img.xkw.com/dksih/QBM/2021/7/8/2759751319707648/2777760744325120/STEM/ede128cb-f7cd-45e0-b834-efbf130c4aef.png?resizew=477)
(1)若
为
的中点,证明:
平面
;
(2)把正四面体
与正四棱锥
全等的两个面重合,排成一个新的几何体,问该几何体由多少个面组成?并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/858d5bfe390d0cb79cee200241240a31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://img.xkw.com/dksih/QBM/2021/7/8/2759751319707648/2777760744325120/STEM/ede128cb-f7cd-45e0-b834-efbf130c4aef.png?resizew=477)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4db9b82b67efe45a02fca32bfcf5dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca6d50356a01ae13936f1bd8efa94c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb304d905125170bebfada27e7ed8960.png)
(2)把正四面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/858d5bfe390d0cb79cee200241240a31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
您最近一年使用:0次
2021-08-02更新
|
893次组卷
|
3卷引用:福建省福州市2020-2021学年高一下学期期末数学试题
名校
解题方法
8 . 在棱长为1的正方体
中,点
、
、
分别为
、
、
的中点,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
A.![]() ![]() ![]() |
B.点![]() ![]() ![]() |
C.直线![]() ![]() ![]() |
D.平面![]() |
您最近一年使用:0次
2021-08-02更新
|
640次组卷
|
3卷引用:福建省福州市2020-2021学年高一下学期期末数学试题
名校
9 . 如图,在棱长为1的正方体
中,P是
上的动点,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.png)
A.直线![]() ![]() |
B.![]() ![]() |
C.![]() |
D.当P与![]() ![]() ![]() |
您最近一年使用:0次
2021-08-01更新
|
1701次组卷
|
8卷引用:福建省莆田市2020-2021学年高一下学期期末数学试题
福建省莆田市2020-2021学年高一下学期期末数学试题福建省南安市蓝园高级中学2022-2023学年高二下学期期末考试数学试题广东省广州市三校联考2021-2022学年高一下学期期中数学试题广东省广州市三校2022-2023学年高一下学期期中联考数学试题安徽省安庆市桐城中学2023届高三下学期第一次模拟数学试卷(已下线)第10讲空间直线、平面的平行(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)(原卷版)(已下线)【江苏专用】高一下学期期末模拟测试B卷【人教A版(2019)】专题02立体几何与空间向量(第二部分)-高二下学期名校期末好题汇编
名校
解题方法
10 . 如图,平面
平面
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/3cffc3f2-b258-439b-b7db-c5298952c3c8.png?resizew=163)
(1)求证:
平面
;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a4e3f0349fa83dc2a0b7d798f04843.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ff6307019d82d2a2a51e0ffd4ebf345.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91686de6945575230a817f6f9c6042cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/535e49978f2938bdaf12521fdde7de8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91a5deba0b92c6c7ae4a660a9f3991f2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/3cffc3f2-b258-439b-b7db-c5298952c3c8.png?resizew=163)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40f44f2b2f82a9126223138972850aa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1893d78af450a5fa09810537adc2dfa.png)
您最近一年使用:0次
2021-08-01更新
|
731次组卷
|
4卷引用:福建省莆田市2020-2021学年高一下学期期末数学试题