1 . 在正方体
中,
为棱
上一点,且
,
为棱
的中点,且平面
与
交于点
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09300cee611ea4a07e388cc76bf42fd6.png)
_____ .
![](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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39e7b83a2497d1662d1a95ec4cbb7495.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09300cee611ea4a07e388cc76bf42fd6.png)
您最近一年使用:0次
解题方法
2 . 如图,在正方体
中,点
为
上一动点(含端点),则下列四个结论:①
平面
;②
;③平面
平面
;④点
到平面
的距离为定值.其中一定正确的结论序号是__________ .
![](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/8cfbc0b5a8fbde804bd8425a4b76d207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f33fa5152ba27f7b8a28890cefca219.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a935b7d21a103a264b6e96ecf82dbe4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f14e9e39ba92b3d94b4c5a1d6a82265.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07dcf279d1756918052618fcb9b39107.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fae7f4612c548b1f72a964ddb291cd2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a935b7d21a103a264b6e96ecf82dbe4a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/27/4bc9dcd0-a264-495d-bdb4-04c17320ef97.png?resizew=159)
您最近一年使用:0次
2021-08-16更新
|
174次组卷
|
2卷引用:江西省南昌市八一中学、洪都中学等七校2020-2021学年高二下学期期中联考数学(理)试题
名校
解题方法
3 . 如图,
,
均为
的直径,
所在的平面,
.求证:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/22/79380500-e969-478b-a437-008ffc019daa.jpg?resizew=153)
(1)
;
(2)直线
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee349dce93eb54eaa0a98e29609e6ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac192cfba38bf0e2df0c2d490596aa65.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/22/79380500-e969-478b-a437-008ffc019daa.jpg?resizew=153)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f2bd3555b7a604e1d3c460bfa068adb.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40f44f2b2f82a9126223138972850aa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
您最近一年使用:0次
2021-08-09更新
|
402次组卷
|
2卷引用:江西省赣州市兴国平川中学2022-2023学年高二下学期期中数学试题
名校
4 . 在三棱柱
中,
为该棱柱的九条棱中某条棱的中点,若
平面
,则
为( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07391ef575d28f09bc5cda0ff8130a54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a935b7d21a103a264b6e96ecf82dbe4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
A.棱![]() | B.棱![]() | C.棱![]() | D.棱![]() |
您最近一年使用:0次
2021-05-09更新
|
1131次组卷
|
10卷引用:江西省景德镇市昌江区景德镇一中2023-2024学年高二上学期11月期中考试数学试题
江西省景德镇市昌江区景德镇一中2023-2024学年高二上学期11月期中考试数学试题江西省宜春市上高二中2023-2024学年高二上学期第三次月考数学试题陕西省榆林市2021届高三下学期第四次模拟考试文科数学试题宁夏银川市第二中学2021届高三下学期二模数学(文)试题山西省晋城市2021届高三三模数学(文)试题广西2021届高三5月联考数学(文)试题吉林省白山市2021届高三三模联考数学(文科)试题甘肃省白银市靖远县2021届高三第四次联考数学(文)试题四川省泸县第五中学2022-2023学年高三下学期开学考试数学(文)试题云南省昭通市绥江县第一中学2020-2021学年高一下学期期末考试数学试题
名校
5 . 在正方体
中,E,F分别是棱
,BC的中点,现有下列四个结论:①A,E,F,
四点共面;②平面
平面
;③![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5de8026bd1b6af298df08e532c2847d.png)
平面
;④
与平面ABCD所成角为
.其中正确的结论的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8dc6db50a9709c3f4d84eee7bdf1250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2bf9ef324f1289e205e29fed105c38e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5de8026bd1b6af298df08e532c2847d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5de8026bd1b6af298df08e532c2847d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
2021-02-03更新
|
347次组卷
|
3卷引用:江西省南昌市进贤第一中学2020-2021学年高二下学期期中考试数学(理)试题
名校
解题方法
6 . 如图,已知正方体
的棱长为
,
、
分别是棱
、
的中点.若点
为侧面正方形
内(含边界)动点,且
平面
,则点
的轨迹长度为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/5df58cb6-0a81-4e9b-91d7-6a276a8cc68c.png?resizew=146)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.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/03902478df1a55bc99703210bccab910.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/5ebb05874eb3353d754af24c9974273e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b668b5c01e0b1a529cc4e3efb2e9057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/5df58cb6-0a81-4e9b-91d7-6a276a8cc68c.png?resizew=146)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-01-02更新
|
643次组卷
|
5卷引用:江西省景德镇一中2021-2022学年高一(19)班下学期期中考试数学试题
名校
7 . 如图,在四棱锥
中,底面
是菱形,
是线段
上一点(不含
,
),在平面
内过点
作
平面
交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/3022e973-ed12-4977-b120-3619f30185a4.png?resizew=199)
(Ⅰ)写出作
的步骤(不要求证明);
(Ⅱ)若
,
,
是
的中点,求平面
与平面
所成锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67a1822040c893d9c4961acc810afe02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1651b87ec052cefebae47d1e589c5146.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21665d21bbfb04410c78345de1fd15ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/defa5b53043ae802bb1af7d14374406d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/3022e973-ed12-4977-b120-3619f30185a4.png?resizew=199)
(Ⅰ)写出作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5634a208294350f8ec151cd19b6d3278.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb8fb552b9e21dbaba74d11aa747790.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/692168695aa4666d9e262a6f71e9254a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/defa5b53043ae802bb1af7d14374406d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21665d21bbfb04410c78345de1fd15ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67a1822040c893d9c4961acc810afe02.png)
您最近一年使用:0次
2020-12-04更新
|
579次组卷
|
4卷引用:江西省峡江中学2021-2022学年高二11月期中考试数学(理)试题
江西省峡江中学2021-2022学年高二11月期中考试数学(理)试题四川省泸州市2021届高三第一次诊断性考试理科数学(一模)试题(已下线)理科数学-学科网2021年高三5月大联考考后强化卷(新课标Ⅰ卷)四川省泸县第四中学2023-2024学年高三上学期10月月考数学(理)试题
名校
解题方法
8 . 如图,在三棱柱
中,
平面
,
,
,
分别是
,
的中点,
在线段
上,则
与平面
的位置关系是( )
![](https://img.xkw.com/dksih/QBM/2020/11/9/2589446053699584/2590938753056768/STEM/63df22b994494b83a60c65bf392345ae.png?resizew=169)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.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/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ffc7d1af9053b027cf9e726f5367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46b91c857bbe3c4f0f08dd2a4124a96e.png)
![](https://img.xkw.com/dksih/QBM/2020/11/9/2589446053699584/2590938753056768/STEM/63df22b994494b83a60c65bf392345ae.png?resizew=169)
A.垂直 | B.平行 | C.相交但不垂直 | D.要依![]() |
您最近一年使用:0次
2020-11-12更新
|
362次组卷
|
5卷引用:江西省贵溪市实验中学2020-2021学高二上学期期中考试数学(文)试题
名校
解题方法
9 . 如图,在四棱锥
中,底面ABCD为正方形,
平面ABCD,
,点E,F,G分别为PC,PA,BC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/26ab6bab-17ae-4aca-a9bc-bc8627892aaf.png?resizew=164)
(1)求证:
;
(2)求证:
平面PCD;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71d05cabe8b2ed458352638ef291ab45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/26ab6bab-17ae-4aca-a9bc-bc8627892aaf.png?resizew=164)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d55bc62f8afd58b044a0c24bf361d0c5.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a779876cdfb2c489ad0eaed0f73e6b.png)
您最近一年使用:0次
名校
解题方法
10 . 已知正方体
的棱长为2,
为棱
的中点,点
在正方形
内运动,且直线
平面
,则动点
的轨迹长度为______ .
![](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/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac480d8d9d7821b62a603cf5cfda236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/657dffbd3623b705f871878fbd9df57e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
您最近一年使用:0次
2020-04-01更新
|
575次组卷
|
4卷引用:江西省南昌市进贤二中2019-2020学年高二下学期数学期中考试数学试题
(已下线)江西省南昌市进贤二中2019-2020学年高二下学期数学期中考试数学试题四川省仁寿第一中学校北校区2018-2019学年高二上学期期中数学(理)试题陕西省安康二中2019-2020学年高一上学期期末数学试题(已下线)8.4-8.6单元测试2【师说智慧课堂】新教材人教A(2019)必修(第二册)