如图,四棱锥
中,底面
是平行四边形,
、
分别是
、
的中点.证明:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
2020高三·全国·专题练习 查看更多[8]
(已下线)考点22 空间几何平行问题(讲解)-2021年高考数学复习一轮复习笔记2023年广东省普通高中学业水平合格性考试模拟(七)数学试题(已下线)第八章立体几何初步章末题型大总结(精讲)(2)-【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)(已下线)第26讲 空间直线、平面的平行的判定4种常见方法(已下线)8.5.2 直线与平面平行(精讲)-【题型分类归纳】2022-2023学年高一数学同步讲与练(人教A版2019必修第二册)(已下线)13.2.3 直线与平面的位置关系(已下线)专题09 基本图形的平行与垂直-期中期末考点大串讲(苏教版2019必修第二册)(已下线)8.5.2 直线与平面平行-同步精品课堂(人教A版2019必修第二册)
更新时间:2022-10-30 14:41:01
|
【知识点】 证明线面平行
相似题推荐
解答题-证明题
|
较易
(0.85)
解题方法
【推荐1】如图,在三棱锥P-ABC中,
平面ABC且
,D、E分别为PC、AC的中点.
![](https://img.xkw.com/dksih/QBM/2020/12/4/2607030706159616/2610290560802816/STEM/e19ab49372564841a6388c91c71f7b42.png?resizew=214)
(1)求证:
平面BDE;
(2)求证:平面
平面PAC.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://img.xkw.com/dksih/QBM/2020/12/4/2607030706159616/2610290560802816/STEM/e19ab49372564841a6388c91c71f7b42.png?resizew=214)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8c2b786c64e6a9ed2ec5670cde74f86.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3547a914468b082d8d8741b974a03190.png)
您最近一年使用:0次
解答题-证明题
|
较易
(0.85)
名校
【推荐2】已知直三棱柱
面
为
的中点.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
平面
;
(2)若直三棱柱
的体积为1,且
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27a995198c9bf83ef25bc6f57c5ac63c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a72a7fdfbce1d996d57941777dc176b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e67d36d29ac86703724d98da567659ec.png)
(2)若直三棱柱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a9ad711b25c36dae0c2a2cedff9954.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829018a6ca0aff95d89e3f7cd943274e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9961e091f180e964a962adf6916f33c8.png)
您最近一年使用:0次