题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021124145-38089.png)
A.16π | B.24π | C.32![]() | D.48π |
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021124145-38089.png)
O为球心,O′为△ABC所在截面的圆心,E为AD中点.|OE|=|O′A|=
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021124146-71861.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021124146-11749.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021124145-73917.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021124145-73917.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021124145-73917.png)
核心考点
试题【已知A,B,C,D是同一球面上的四个点,其中△ABC是正三角形,AD⊥平面ABC,AD=2AB=6,则该球的表面积为( )A.16πB.24πC.32πD.4】;主要考察你对柱锥台的表面积等知识点的理解。[详细]
举一反三
A.S1>S2>S3,V1>V2>V3 |
B.S1<S2<S3,V1<V2<V3 |
C.S1>S2>S3,V1=V2=V3 |
D.S1<S2<S3,V1=V2=V3 |
A.![]() ![]() | B.4![]() |
C.![]() ![]() | D.4![]() ![]() ![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021124110-59620.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021124110-63163.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021124110-22329.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021124110-31160.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021124110-67480.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021124111-41445.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021124111-42965.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021124111-55576.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021124111-29132.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021124112-98824.png)
(1)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021124112-97020.png)
(2)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021124112-81278.png)
(3)求三棱锥
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021124112-50846.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021124113-83110.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021124045-18719.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021124045-28668.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021124045-40079.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021124045-64727.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021124045-42019.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021124045-31557.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021124045-10723.jpg)
(1)证明:平面
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021124045-25427.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021124046-84147.png)
(2)证明:
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021124045-64727.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021124046-10029.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021124046-54209.png)
(3)若
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021124046-83547.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021124045-18719.png)
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