名校
解题方法
1 . 如图,已知
分别是三棱锥
棱
上的点.
为平行四边形,证明:
面
;
(2)若
分别是
的中点,且
,直线
和直线
所成角为
,求直线
和直线
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d45053e5879b431923e0d53b57091f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a94d59dee2d5a8f0425b64b2083825.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/068eeefc0c19329cc04ff28ba51ac090.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ac79e422ba4876949f0514c44539b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce3da36477d98f47fff39520e496617.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ac79e422ba4876949f0514c44539b1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1e6d86c5142ba1576cc277dbf32994.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1655c164ebe93332ef4d9fed6bdeb04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7288db347b6e10d3d679d4030c857a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd4fce8e923062b9779553d6f282895b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd4fce8e923062b9779553d6f282895b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce2790947716b1cfa9c5e7a65db4093.png)
您最近一年使用:0次
名校
解题方法
2 . 如图1,山形图是两个全等的直角梯形
和
的组合图,将直角梯形
沿底边
翻折,得到图2所示的几何体.已知
,
,点
在线段
上,且
在几何体
中,解决下面问题.
平面
;
(2)若平面
平面
,证明:
.
![](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/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10de2459bc376f9a3de90f74cc18ca7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cde387abe3ecba7cde65df9c58131b04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74a39a7453e6994a580038828513c68c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a3b8602719b3d371bc9ec6c441bb9f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31c34b18525831f3eda7bb90be0199b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7513c5dc6e1d35f76020f8f60c95669.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3547a914468b082d8d8741b974a03190.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c897a54f2e36bc4b52fba74b41c89d2d.png)
您最近一年使用:0次
2023-11-24更新
|
606次组卷
|
8卷引用:河北省部分高中2024届高三上学期11月联考数学试题
河北省部分高中2024届高三上学期11月联考数学试题陕西省榆林市府谷县第一中学2024届高三上学期第五次月考数学(理)试题山西省运城市盐湖区第五高级中学2024届高三上学期一轮复习成果检测数学试题江西省部分地区2023-2024学年高三上学期11月质量检测数学试题(已下线)热点6-1 线线、线面、面面的平行与垂直(6题型+满分技巧+限时检测)(已下线)第15讲 8.6.3平面与平面垂直(第2课时)-【帮课堂】(人教A版2019必修第二册)(已下线)13.2.4 平面与平面的位置关系(2)-【帮课堂】(苏教版2019必修第二册)(已下线)11.4.2平面与平面垂直-同步精品课堂(人教B版2019必修第四册)
3 . 已知正方体
的棱长为1,点
为线段
上的动点,则( )
![](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/0d8772aa893a9c1d40f714cb25701701.png)
A.![]() ![]() |
B.![]() ![]() |
C.直线![]() ![]() ![]() ![]() ![]() ![]() |
D.点![]() ![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
2023-06-08更新
|
663次组卷
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4卷引用:河北省高中名校联盟2022-2023学年高一下学期联合测评数学试题
4 . 如图1,四边形
是矩形,将
沿对角线
折起成
,连接
,如图2,构成三棱锥
.过动点
作平面
的垂线
,垂足是
.
落在何处时,平面
平面
,并说明理由;
(2)在三棱锥
中,若
为
的中点,判断直线
与平面
的位置关系,并说明理由;
(3)设
是
及其内部的点构成的集合,
,当
时,求三棱锥
的体积的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53f8441e5e499d705e4625e4c7db33dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac8b40d14544a9be0bebdb276f0fa865.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c586b72a984e1fd9082b9f02ef7f3e91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5933dbf3b867e009b26602dfbe0458e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58ebf8aa867ccca195ec94c3c96e9b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)在三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c586b72a984e1fd9082b9f02ef7f3e91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfe1b2308c10e10cd8deaeddf9614a53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57e7281b475e016846062667edbd754e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/172732c3b3e074a1f04599c355872fb3.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9639896487e6cf18e8fd02d2a7ed2087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be73600a92d9b8eb472bad7b6acc334.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c586b72a984e1fd9082b9f02ef7f3e91.png)
您最近一年使用:0次
2022-07-11更新
|
437次组卷
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5卷引用:河北省赵县中学2022-2023学年高一下学期5月月考数学试题
河北省赵县中学2022-2023学年高一下学期5月月考数学试题河北省石家庄市五校联合体2022-2023学年高一下学期期中数学试题北京市大兴区2021-2022学年高一下学期期末检测数学试题(已下线)模块五 高一下期中重组篇(河北)(已下线)专题06 空间中点线面的位置关系6种常考题型归类(2) -期期末真题分类汇编(北京专用)
5 . 如图1,E,F分别为等腰梯形底边AB,CD的中点,
,将四边形EFCB沿EF进行折叠,使BC到达
位置,连接
,
,如图2,使得
,则( )
![](https://img.xkw.com/dksih/QBM/2021/6/3/2735157164769280/2800659203899392/STEM/d7529522-715c-4ee4-af5c-d8fe97ded551.png?resizew=541)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd3d939060ce848dc1bf23426849172c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93ecad355286188fd317939fa50f9555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ab087e30b32c84306c3755ac6b33531.png)
![](https://img.xkw.com/dksih/QBM/2021/6/3/2735157164769280/2800659203899392/STEM/d7529522-715c-4ee4-af5c-d8fe97ded551.png?resizew=541)
A.![]() ![]() |
B.平面![]() ![]() |
C.![]() ![]() |
D.多面体![]() ![]() |
您最近一年使用:0次