题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004317-22477.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004317-90748.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004317-50566.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004318-56873.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004318-32704.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004318-83679.gif)
(I)在三棱柱
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004318-32842.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004319-81392.gif)
(II)在三棱柱
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004319-37850.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004319-24264.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004319-86155.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004320-43793.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004320-94080.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004320-10410.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004320-89940.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004320-79294.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004320-64900.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004321-32690.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004321-19216.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004321-33643.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004321-53791.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004322-91034.gif)
(
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004322-26028.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004322-78206.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004322-63242.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004322-23252.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004322-86306.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004323-44387.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004323-44782.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004323-75344.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004323-15814.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004324-57260.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004324-66093.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004324-56381.gif)
解析
核心考点
试题【(12分)已知三棱柱的三视图如图所示,其中正视图和侧视图均为矩形,俯视图中,。(I)在三棱柱中,求证:;(II)在三棱柱中,若是底边的中点,求证:平面;】;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
(本小题满分14分)
如图所示,在长方体
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004310-40071.png)
(Ⅰ)求异面直线A1M和C1D1所成的角的正切值;
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004311-98730.png)
(Ⅱ)证明:平面ABM⊥平面A1B1M1
如图,在正方体ABCD-A1B1C1D1中,E、F分别是BB1、CD的中点.
(Ⅰ)证明AD⊥D1F;
(Ⅱ)求AE与D1F所成的角;
(Ⅲ)证明面AED⊥面A1FD1;
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004252-36728.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004252-45834.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004252-80610.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004252-45834.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004252-78998.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004253-58200.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004253-89779.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004253-34716.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004253-29364.gif)
(Ⅰ)当点
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004253-34716.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004253-29364.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004254-55056.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004254-46739.gif)
(Ⅱ)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004254-55621.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004254-33954.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004237-53389.gif)
如图,矩形
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004238-18520.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004238-39266.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004238-25207.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004238-49506.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004238-42270.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004239-14285.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004239-16237.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004239-57295.gif)
(Ⅰ)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004239-67435.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004240-45665.gif)
(Ⅱ)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004240-38454.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004240-10368.gif)
(Ⅲ)求三棱锥
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021004240-39963.gif)
①任意一个三角形确定一个平面,②任意一个四边形确定一个平面,
③任意一个梯形确定一个平面,④任意一个平行四边形确定一个平面;
A.![]() | B.![]() | C.![]() | D.![]() |
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