如图,长方体ABCD-A1B1C1D1的底面ABCD是边长为2的正方形,AA1=4,点E为棱AA1的中点.
(1)求证:BE⊥平面EB1C1;
(2)求点A到平面CEB1的距离.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/19/4af58973-0032-4ab5-ae96-d9ee533f5555.png?resizew=138)
(1)求证:BE⊥平面EB1C1;
(2)求点A到平面CEB1的距离.
更新时间:2023-06-03 13:10:15
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【推荐1】如图1,在直角梯形
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(1)若
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(1)若
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【推荐2】在四棱锥P﹣ABCD中,PD⊥平面ABCD,AD⊥CD,且DB平分∠ADC,E为PC的中点,AD=CD=1,DB=2
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(1)证明PA∥平面BDE
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(3)求四棱锥P﹣ABCD的体积.
![](https://img.xkw.com/dksih/QBM/2011/8/5/1570280800018432/1570280805138432/STEM/2ae259b63ae54e398c55e51209234adc.png?resizew=219)
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【推荐3】在直三棱柱
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解答题-问答题
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适中
(0.65)
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【推荐1】如图,直角梯形
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(1)求点
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【推荐2】已知在四棱锥
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;
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