题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032727-41624.png)
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![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032728-87285.png)
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![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032728-87285.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032727-41624.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032728-39069.png)
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![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032728-87285.png)
A.![]() | B.![]() | C.![]() | D.![]() |
答案
解析
试题分析:如下图所示,在正方体
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032730-20698.png)
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![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032732-65098.png)
平面
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032732-44055.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032736-78153.png)
核心考点
试题【已知、是两条直线,、是两个平面,给出下列命题:①若,,则;②若平面上有不共线的三点到平面的距离相等,则;③若、为异面直线,,,,,则.其中正确命题的个数( 】;主要考察你对线线角等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032721-97214.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032721-96124.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032722-52189.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032722-17345.png)
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![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032723-50818.png)
A.③⑤ | B.①⑤ | C.①④ | D.②⑤ |
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032710-47907.png)
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![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032711-42076.png)
(1)求证:平
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032711-17939.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032712-62201.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032712-85499.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032706-47431.png)
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![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032700-40851.png)
(1)设平面ABE与平面ACD的交线为直线
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032700-12549.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032700-12549.png)
(2)设F是BC的中点,求证:平面AFD⊥平面AFE;
(3)求几何体ABCDE的体积.
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032700-37220.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032649-38775.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032649-81326.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032649-94348.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032649-42134.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032650-66091.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032650-89854.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032650-28286.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032650-19481.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032651-16624.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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