题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044155-19390.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044155-65946.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044155-19374.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044155-65946.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044155-75484.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044156-66901.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044156-16659.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044156-66073.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044156-98928.gif)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044157-29719.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044157-65122.gif)
同理
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044157-12959.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044157-86923.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044157-49856.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044158-88083.gif)
于H,连接AH,
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044158-27507.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044158-23401.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044158-66396.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044159-57165.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044159-50793.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044158-66396.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044159-72061.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044159-18457.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044157-49856.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044158-66396.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044159-44055.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044158-88083.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044200-91204.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044158-66396.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044200-72833.gif)
面角
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044156-66073.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044158-66396.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044156-66073.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044156-98928.gif)
核心考点
试题【(13分)在五棱锥中,PA=AB=AE=2,PB=PE=, BC=DE=,.(Ⅰ)求证:PA平面(Ⅱ)求二面角 的大小。】;主要考察你对空间几何体的结构特征等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044139-63775.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044139-12826.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044139-66312.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044139-95557.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044139-27613.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044139-98702.gif)
(Ⅰ)证明:
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044140-69126.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044140-98163.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044140-97502.gif)
(Ⅱ)求点
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044140-39913.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044140-85009.gif)
(Ⅲ)求二面角
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044140-91418.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044126-72864.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044108-14347.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044108-51177.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044108-95637.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044108-83452.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044108-43151.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044108-44511.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044108-12157.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044108-11768.gif)
(Ⅰ)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044109-55917.gif)
(Ⅱ)求点
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044109-28119.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044109-82335.gif)
(Ⅲ)求二面角
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044109-90246.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044056-58918.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044056-76281.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044056-29838.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044057-37160.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044057-84476.jpg)
(I)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044057-58203.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044057-34762.gif)
(Ⅱ)求二面角
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021044057-46215.gif)
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