如图,正方体
的棱长为4,E是侧棱
的中点,则平面
截正方体
所得的截面图形的周长是( ).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/9/bbd744d1-1fa7-4e41-960a-8be8b22fb7c0.png?resizew=173)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b886daa3c9bb7153acd9f651f99eb2c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/9/bbd744d1-1fa7-4e41-960a-8be8b22fb7c0.png?resizew=173)
A.![]() | B.![]() |
C.![]() | D.![]() |
22-23高一下·江苏淮安·阶段练习 查看更多[2]
更新时间:2023-08-09 14:15:33
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【推荐1】如图所示,在正方体
中,点
,
,
,
分别为棱
,
,
,
上的中点,下列判断正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/b7715fd0-f30a-40dd-a3c3-404e7eef427c.png?resizew=144)
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A.直线![]() ![]() | B.直线![]() ![]() |
C.平面![]() ![]() | D.平面![]() ![]() |
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【推荐2】正方体
的棱长为2,
是棱
的中点,则平面
截该正方体所得的截面面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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A.![]() | B.![]() | C.4 | D.![]() |
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【推荐1】如图,在四面体
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去截该四面体,由此得到一个多边形截面,则该多边形截面面积最大值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/a8be0263-6a58-4f47-a96f-2ccf56974200.png?resizew=164)
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【推荐2】若空间中
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