解题方法
1 . 如图,平面
平面
,四边形
为矩形,
和
均为等腰直角三角形,且
.
![](https://img.xkw.com/dksih/QBM/2021/10/24/2836443365507072/2838620690685952/STEM/666fa56bf29c492886ea5d466a5bca9c.png?resizew=187)
(1)求证:平面
平面
;
(2)若点
为线段
上任意一点,求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf9a6db3571fa57bfa2d5e4d44c51b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5ec3f44cd7f4689920e5df628177737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/004104bafb5f30338123d4ea2b7fedde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52c5fd1c0e29b240c0b8906ca9054a46.png)
![](https://img.xkw.com/dksih/QBM/2021/10/24/2836443365507072/2838620690685952/STEM/666fa56bf29c492886ea5d466a5bca9c.png?resizew=187)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39282bdf319f30d7bc261e2e3ab3b1e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e60db93cd34a54c98da9ff9782656c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
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2021-10-27更新
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641次组卷
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3卷引用:第15课时 课前 平面与平面垂直的性质