在棱长为2的正方体
中,点E是棱
的中点,过点E作垂直于直线
的截面,则该截面的面积为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
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更新时间:2023-07-03 14:49:58
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【推荐1】如图,在三棱锥P–ABC的平面展开图中,AC=1,
,AB⊥AC,AB⊥AD,∠CAE=30°,则cos∠FCB=______________ .
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【推荐2】在
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【推荐1】如图,在四棱锥
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__________ .
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【推荐2】设正三棱锥
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【推荐1】已知圆锥
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