如图,长方体
中,
,
,点
为
的中点. 求证:直线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
平面PAC;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/006c1fca04581d10987540a84fe22dfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a4acc5d21a7490e6bed2453cc5147c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
2023高一·全国·专题练习 查看更多[2]
更新时间:2023-04-01 23:15:35
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【知识点】 证明线面平行
相似题推荐
解答题-证明题
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【推荐1】如图所示,四边形EFGH为四面体ABCD的一个截面,若四边形EFGH为平行四边形.
![](https://img.xkw.com/dksih/QBM/2023/8/13/3301867851661312/3324837547491328/STEM/ecc701d194e74a1fabaa33202017fc79.png?resizew=166)
(1)求证:
平面
;
(2)若
,
,求四边形
周长的取值范围.
![](https://img.xkw.com/dksih/QBM/2023/8/13/3301867851661312/3324837547491328/STEM/ecc701d194e74a1fabaa33202017fc79.png?resizew=166)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fdb2b9d6a4a54ed1328c5b3adcf7b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eca7e1a727ba332984ad857b3d25344d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
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解答题-证明题
|
较易
(0.85)
名校
解题方法
【推荐2】如图,已知正方体ABCD﹣A1B1C1D1的棱长为2,E为AB的中点
![](https://img.xkw.com/dksih/QBM/2020/1/15/2377795714359296/2422426175660032/STEM/3e7c8d2f935d441ab09c5ba55d365c57.png?resizew=211)
(1)求证:BD1//平面A1DE;
(2)求点C到平面A1DE的距离.
![](https://img.xkw.com/dksih/QBM/2020/1/15/2377795714359296/2422426175660032/STEM/3e7c8d2f935d441ab09c5ba55d365c57.png?resizew=211)
(1)求证:BD1//平面A1DE;
(2)求点C到平面A1DE的距离.
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