名校
解题方法
1 . 如图,四边形
是矩形,
平面
,
平面
.
![](https://img.xkw.com/dksih/QBM/2021/11/29/2861790395727872/2863416940191744/STEM/0e1bcca6-f919-45f7-891e-20b832e5bcab.png?resizew=233)
(1)证明:平面
平面
.
(2)若平面
与平面
的交线为
,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7a38e6c6dfde2b19b6b47f35a439a06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1d3de310412c0fa445acd2cdb61513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2021/11/29/2861790395727872/2863416940191744/STEM/0e1bcca6-f919-45f7-891e-20b832e5bcab.png?resizew=233)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e623816106bf7ef00fdb597f53c23ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09d9d486b7f91ba933210dd013a7f2c.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0cc699a65e140dd4be6195f25c1e85d.png)
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