名校
1 . 如图,在直三棱柱
中,
,D、E、F分别是棱
、
、
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/14/a7465249-ec66-41af-977d-bbca1c736f25.png?resizew=139)
(1)求证:DF
平面
;
(2)若
,求平面DEF与平面ABC的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/002c709e9fee8d477bddfe595cc760f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/14/a7465249-ec66-41af-977d-bbca1c736f25.png?resizew=139)
(1)求证:DF
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e53b212640dadf751ef7f65a78a209.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a7077d7e5ceacb3cd5d7338a8da069c.png)
您最近一年使用:0次
2023-02-12更新
|
663次组卷
|
4卷引用:广东省广州市天河区2022-2023学年高二上学期期末数学试题
解题方法
2 . 如图,在四棱锥
中,底面ABCD为直角梯形,且
,
,已知侧棱
平面ABCD,设点E为棱PD的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/13/3bfbcaf5-975d-4500-91ec-31ac4b7a199c.png?resizew=148)
(1)证明:
平面ABP;
(2)若
,求点P到平面BCE的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a3ac3a23bf91b117707ec6d6263936c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f95475bfc06e884754eb4a455c3f434e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/13/3bfbcaf5-975d-4500-91ec-31ac4b7a199c.png?resizew=148)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/932a04304f2d4975955d4baabb2deeea.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37365646d2b85aeaa4d27e5fbea40287.png)
您最近一年使用:0次
3 . 如图,在棱长为2的正方体
中,E为AD中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/11/21d9e232-e6ce-4955-8299-943fba9519a4.png?resizew=165)
(1)求平面
与平面
夹角的余弦值;
(2)探究线段
上是否存在点F,使得
平面
?若存在,确定点F的位置;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/11/21d9e232-e6ce-4955-8299-943fba9519a4.png?resizew=165)
(1)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c3d4ce1c93577849ede590111fdf14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba4cffe5e9a3c0f5d2e3ac65fa30587d.png)
(2)探究线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40f44f2b2f82a9126223138972850aa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1c1acd7da8817385417e1dff25bfe25.png)
您最近一年使用:0次
4 . 如图,在四棱锥
中,
,
平面
,
,
,
,
,
为
中点.
(1)证明:
//平面
;
(2)过点
作平行于平面
的截面,画出该截面,说明理由,并求夹在该截面与平面
之间的几何体的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99da52604d90b4772725a2632a39dbb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/105068b25f5a63af32f4082cfe08691e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74d415fc177602419318970258793c8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e2a44d05b1d387150c4b359e021ffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ec435aa1401dbce7863b531bf2f3e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/29/42c98de0-a962-4637-90ee-ffcff8fbd1dd.png?resizew=155)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
您最近一年使用:0次
名校
解题方法
5 . 如图,在透明塑料制成的长方体
容器内灌进一些水,将容器底面一边
固定于地面上,再将容器倾斜,随着倾斜度的不同,有下面四个命题,其中正确的命题是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/30/1dd805e7-101f-4d22-90f8-b5261752523a.png?resizew=480)
A.没有水的部分始终呈棱柱状 | B.水面四边形![]() |
C.棱![]() ![]() | D.当![]() ![]() |
您最近一年使用:0次
2023-06-26更新
|
496次组卷
|
2卷引用:广东省广州市第八十六中学2021-2022学年高一下学期期末数学试题
6 . 如图,在三棱锥
中,底面
是边长为4的正三角形,
,三棱锥
的体积为
是
的中点,
是
的中点,点
在棱
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/8/9e3549a1-b99a-4b41-9138-b49662b88a50.png?resizew=181)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
平面
;
(2)求平面
和平面
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e186e4b68ed0e15a9372f41b059aca31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2e7d411f1b49e6745386ed5ea92fed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a4e74f13a8cf94dd21889f7e4316d8e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/8/9e3549a1-b99a-4b41-9138-b49662b88a50.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/e7b7c83470489253394bd288d7c920df.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
2023-02-03更新
|
313次组卷
|
2卷引用:广东省河源市2022-2023学年高三上学期期末数学试题
解题方法
7 . 如图,在三棱柱
中,侧面
是边长为2的正方形,
,
,
分别是
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/20/64392742-23c2-4078-bc52-f8c951da8377.png?resizew=170)
(1)证明:
平面
;
(2)若
,再从条件①、条件②中选择一个作为条件,求直线
与平面
所成角
的正弦值.
条件①:异面直线
与
所成的角为45°;
条件②:
是等腰三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc0a886f1192d450ced9fd875e78425e.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/20/64392742-23c2-4078-bc52-f8c951da8377.png?resizew=170)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eaa5e336f830a3e5cd60ff7a756f3ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af260e0d98c95d1e092dc4c6d348e3ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1885efcff0b903e314057dd153578600.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
条件①:异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
条件②:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
您最近一年使用:0次
名校
8 . 如图,正方体
中,顶点A在平面α内,其余顶点在α的同侧,顶点
,B,C到
的距离分别为
,1,2,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/4/035c5dcf-9a43-41c7-a894-4905fcd1bd2a.png?resizew=150)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35361e76a7c85d1886728c8d0200b234.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/4/035c5dcf-9a43-41c7-a894-4905fcd1bd2a.png?resizew=150)
A.BC∥平面![]() |
B.平面A1AC⊥平面![]() |
C.直线![]() ![]() ![]() ![]() |
D.正方体的棱长为2![]() |
您最近一年使用:0次
2023-01-17更新
|
558次组卷
|
2卷引用:广东省东莞市东莞中学2023届高三上学期期末数学试题
解题方法
9 . 如图,已知平行四边形
与直角梯形
所在的平面互相垂直,且
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/18/cb680926-eb28-4b8f-8e5b-6e0d0d39dd53.png?resizew=210)
(1)证明:
平面
;
(2)证明:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4965b360a5bffd594209445f9240a820.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/18/cb680926-eb28-4b8f-8e5b-6e0d0d39dd53.png?resizew=210)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28f79db7c270b6ff9fb0a538ee201cfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26fdaf049899c52eedf5eb4dcddec62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
您最近一年使用:0次
2023-01-15更新
|
507次组卷
|
3卷引用:广东省协和、华侨、增城中学2022-2023学年高二上学期期末数学试题
广东省协和、华侨、增城中学2022-2023学年高二上学期期末数学试题广东省广州市协和中学等三校2022-2023学年高二上学期期末联考数学试题(已下线)8.6.3平面与平面垂直(第2课时平面与平面垂直的性质定理)(精讲)-【精讲精练】2022-2023学年高一数学下学期同步精讲精练(人教A版2019必修第二册)
名校
10 . 如图,
底面
,
底面
,四边形
是正方形,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/1/440b2526-ff1d-43d2-b766-111902feb3ef.png?resizew=145)
(1)证明:
平面
;
(2)求直线
与平面
所成角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7a38e6c6dfde2b19b6b47f35a439a06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e975fa87eb6a9c2fe19a943cefee808.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/1/440b2526-ff1d-43d2-b766-111902feb3ef.png?resizew=145)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/063510e3c1fb6a7ccc3b8e3e3c7d660e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4d781525777c7b5284dffc70b2a28a.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/422210c777ac0d625bbd81cc7601bf9b.png)
您最近一年使用:0次
2023-01-15更新
|
715次组卷
|
4卷引用:广东省广州市2022-2023学年高二上学期期末数学试题
广东省广州市2022-2023学年高二上学期期末数学试题广西桂林市荔浦县荔城中学2022-2023学年高二上学期期末考试数学试题(已下线)模块五 专题1 期末全真模拟(基础卷1)高二期末安徽省马鞍山市第二中学2022-2023学年高二下学期开学考试数学试题