题目
题型:不详难度:来源:
A.![]() | B.![]() | C.![]() | D.![]() |
答案
解析
解:根据题意知,平面ACD1是边长为
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021090412-47454.png)
则由图得,△ACD1内切圆的半径是
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021090413-45522.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021090413-61717.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021090413-29983.png)
则所求的截面圆的面积是π×
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021090413-61717.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021090413-61717.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021090412-32852.png)
故选D.
核心考点
试题【已知球O是棱长为1的正方体ABCD—A1B1C1D1的内切球,则平面ACD1截球O所得的截面面积为 A.B.C.D.10. 】;主要考察你对空间几何体的视图与直观图等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021090406-62945.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021090406-58316.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021090406-22150.png)
A.30![]() | B.45![]() | C.60![]() | D.75![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021090400-29951.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021090401-52170.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021090401-33637.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021090401-66477.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021090401-42338.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021090402-19675.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021090402-23869.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021090402-25874.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021090402-30064.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021090356-61956.gif)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021090352-88385.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021090345-72171.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021090345-72171.gif)
A.4,7 | B.6,7 | C.4,8 | D.6,8 |
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