解题方法
1 . 已知图1中的正三棱柱
的底面边长为2,体积为
,去掉其侧棱,将上底面绕上、下底面的中心所在的直线
,逆时针旋转
后(下底面位置保持不变),再添上侧棱,得到图2所示的几何体,则下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/2021/7/8/2759898787160064/2778264565530624/STEM/1cd42021-82a6-422e-a0e0-a0eb84b661a3.png?resizew=444)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e65ac334119ccd6204402a7aba29a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfe639eab78eafd2d40ea70aa5d3f21d.png)
![](https://img.xkw.com/dksih/QBM/2021/7/8/2759898787160064/2778264565530624/STEM/1cd42021-82a6-422e-a0e0-a0eb84b661a3.png?resizew=444)
A.![]() |
B.![]() |
C.四边形![]() |
D.正三棱柱![]() ![]() |
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