题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033612-50914.gif)
几何体的体积是
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033612-61469.gif)
答案
解析
核心考点
试题【若某几何体的三视图(单位:cm)如图所示,则此几何体的体积是 】;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/20191021/20191021033602-36328.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033603-58919.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033603-18683.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033603-59142.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033603-95011.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033603-81076.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033603-93479.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033603-18683.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033603-74706.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033604-89486.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033604-42442.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033604-14590.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033604-49072.gif)
(1)直线
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033604-88816.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033604-28863.gif)
(2)平面
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033605-47251.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033605-44261.gif)
图甲是一个几何体的表面展开图,图乙是棱长为
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033550-60357.gif)
(Ⅰ)若沿图甲中的虚线将四个三角形折叠起来,使点
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033550-27886.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033550-20515.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033551-99872.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033551-46445.gif)
(Ⅱ)需要多少个(I)的几何体才能拼成一个图乙中的正方
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033551-37505.gif)
(Ⅲ)在图乙中,点
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033551-78111.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033551-31195.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033552-61765.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033552-41640.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033552-16914.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033552-94137.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033544-24307.gif)
A.![]() | B.2 | C.![]() | D.![]() |
如图,在六面体ABC-DEFG中,平面
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033533-81321.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033533-33722.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033534-79565.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033533-33722.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033534-81525.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033534-40511.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033534-99843.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033534-28293.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033535-39310.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033535-55203.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033535-40608.jpg)
(1)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033535-85209.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033536-42346.gif)
(2)求二面角
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033536-60187.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033517-87969.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033517-63024.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033517-78786.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033517-83325.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033517-29417.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033517-98634.gif)
(2)求证:DM//平面PCB;
(3)求平面PAD与平面PBC所成锐二面角的大小。
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021033517-35306.jpg)
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