名校
1 . 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( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/13/152cce54-f096-4cf2-b0e2-ff64a666f081.png?resizew=166)
![](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/2023/12/13/152cce54-f096-4cf2-b0e2-ff64a666f081.png?resizew=166)
A.三棱锥![]() |
B.直线![]() ![]() |
C.线段![]() ![]() ![]() ![]() |
D.三棱锥![]() ![]() |
您最近一年使用:0次
名校
解题方法
2 . 如图,在长方体
中,
和
交于点
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/17/fab00556-8bb2-4ec6-826b-f4e7204480d8.png?resizew=181)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
平面
;
(2)已知
与平面
所成角为
,求平面
与平面
的夹角的余弦值;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f5bb2bddbe9700b6a1d5a9029d93a0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87cdc08e1c4a04a18d5ecea03393e36d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/17/fab00556-8bb2-4ec6-826b-f4e7204480d8.png?resizew=181)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87cdc08e1c4a04a18d5ecea03393e36d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6261790c66cc71ee3898afabad0c09f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
您最近一年使用:0次
3 . 下列命题中,正确的是( )
A.直线![]() ![]() ![]() ![]() ![]() |
B.向量![]() ![]() ![]() ![]() ![]() |
C.向量![]() ![]() ![]() |
D.平面![]() ![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
2023-12-03更新
|
280次组卷
|
2卷引用:内蒙古部分名校2023-2024学年高二上学期期中联合考试数学试题
4 . 在长方体
中,
,过
、
、
三点的平面截去长方体的一个角后,得到如图所示的几何体
,
、
分别为
、
的中点.
平面
;
(2)求平面
与平面
的夹角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/066b3dc118e127eaeee4005bfec77134.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52eab6de89f4d4e69650e94e0968744.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/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9539f8fb13345b449274b67bbda995db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
您最近一年使用:0次
2023-11-29更新
|
306次组卷
|
3卷引用:内蒙古自治区呼和浩特市回民区2023-2024学年高二上学期期中数学试题
内蒙古自治区呼和浩特市回民区2023-2024学年高二上学期期中数学试题宁夏银川市贺兰县第二高级中学2023-2024学年高二上学期期末考试数学试卷(已下线)浙江省金丽衢十二校2024届高三下学期第二次联考数学试题变式题16-19
名校
解题方法
5 . 已知直三棱柱
中,侧面
为正方形,
,且
,
,
分别为
和
的中点,
为棱
上的点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/31/1ce407cc-7d60-4bb5-aada-4bc61c2445ed.png?resizew=141)
(1)证明:
;
(2)当
为何值时,面
与面
所成的二面角的正弦值最小?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edc50f7febbc2d5d8dcdc23a3630a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/31/1ce407cc-7d60-4bb5-aada-4bc61c2445ed.png?resizew=141)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a7a3dc3f3a02f4400e22dec2f2fee23.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87cdc08e1c4a04a18d5ecea03393e36d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af6c9a36e2ef7189317ae652c56e49c8.png)
您最近一年使用:0次
2023-11-29更新
|
138次组卷
|
2卷引用:内蒙古呼和浩特市内蒙古师大附中2023-2024学年高二上学期期中数学试题
名校
解题方法
6 . 如图,在四棱锥
中,底面ABCD是矩形,侧棱
底面ABCD,点E是PD的中点,
,
.求平面EAC与平面PAB夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9bd628837add19267c186fbff246076.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/30/e5aa7761-c722-4d4d-9a20-a9018229becb.png?resizew=145)
您最近一年使用:0次
解题方法
7 . 如图所示,若长方体
的底面是边长为2的正方形,高为4,
是
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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/29/6ab4eb93-d6e1-41ba-a637-598e9fe456da.png?resizew=114)
A.点B到直线![]() ![]() |
B.三棱锥![]() ![]() |
C.平面![]() ![]() |
D.三棱锥![]() ![]() |
您最近一年使用:0次
2023-11-24更新
|
542次组卷
|
2卷引用:内蒙古自治区赤峰市赤峰第四中学2023-2024学年高二上学期10月月考数学试题
名校
解题方法
8 . 如图,在三棱锥
中,
平面
,点
分别是
和
的中点,设
,直线
与直线
所成的角为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/9a99b762-cfd7-4534-971c-220ef0f3f501.png?resizew=155)
(1)求
的长;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6deecf9ccb7b7879455050633219e09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0497a2b843caeaeb1825e33c5819d84e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2bc5e50b8dfa02601c70822252854a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4db9b82b67efe45a02fca32bfcf5dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a97c5f57aaae02cc5d1cc554c0e4fc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2bc5e50b8dfa02601c70822252854a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/9a99b762-cfd7-4534-971c-220ef0f3f501.png?resizew=155)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2bc5e50b8dfa02601c70822252854a.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faa23fa14f624ad8212bda55d321362f.png)
您最近一年使用:0次
2023-11-20更新
|
232次组卷
|
3卷引用:内蒙古通辽市科左中旗民族职专·实验高中2023-2024学年高二上学期期末数学试题
名校
解题方法
9 . 如图,在矩形
中,
,
,E为线段
中点,现将
沿
折起,使得点D到点P位置,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/31/d44a0903-dde4-47fd-ae48-0ecb9544688f.png?resizew=351)
(1)求证:平面
平面
;
(2)已知点M是线段
上的动点(不与点P,C重合),若使平面
与平面
的夹角为
,试确定点M的位置.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12319a1cdcc58d25c30d2b3ab5848237.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/31/d44a0903-dde4-47fd-ae48-0ecb9544688f.png?resizew=351)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcc60341dc04f3fc7133ed29edc6acdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)已知点M是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad2e849754baf604fa48efe2c82657af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bec7e56107b5f2f34e420caffd1159b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
您最近一年使用:0次
2023-11-19更新
|
459次组卷
|
2卷引用:内蒙古呼和浩特市内蒙古师范大学附中2023-2024学年高二上学期12月月考数学试题
名校
解题方法
10 . 如图:等边三角形的边长为3,
,
.将三角形
沿着
折起,使之成为四棱锥
.点
满足
,点
在棱
上,满足
.且
.
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0e825de4e5ade72e45a28c8f75b1dea.png)
(2)求面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ed0f4fa153785d68b599f658c20e5e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abe5f91935f79a9a922751453e0d32a3.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34c932cfbb9fb63159a176a8f45489a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177fbdd01ed1452f20ef05693156020e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abe5f91935f79a9a922751453e0d32a3.png)
您最近一年使用:0次