如图,
的棱长为1的正方体,任作平面
与对角线
垂直,使得
与正方体的每个面都有公共点,这样得到的截面多边形的面积为
,周长为
的范围分别是_____________ (用集合表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59a80427c5520818aa57e4de7bb5ce7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://img.xkw.com/dksih/QBM/2020/1/12/2375731341819904/2376091990720512/STEM/d9ef730d-97f3-4a80-8db4-452dadf289e8.png)
更新时间:2020-01-13 11:14:26
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困难
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名校
【推荐1】在长方体
中,
,
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分别是棱
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的中点,
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内一动点,若直线
与平面
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解题方法
【推荐2】在正四棱锥
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