解答题-问答题 适中0.64 引用1 组卷711
如图,三棱柱
中,
平面
,
,
是棱
的中点,
.
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572503850123264/1572503856078848/STEM/3eac007c7c2341f983675ad1f8fb06b3.png)
(1)证明:
;
(2)设
,
的中点为
,求点
到平面
的距离.
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572503850123264/1572503856078848/STEM/6abd7cfc6b6046d893e3e8fb3e7896d3.png)
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572503850123264/1572503856078848/STEM/ab581c4b8d4541bab1f2de5f3dd8316d.png)
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572503850123264/1572503856078848/STEM/4a5ced8cd5e34789ae570eeac7e1c3d1.png)
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572503850123264/1572503856078848/STEM/7abf7fb9f09d482eb7b701f43e5d5b66.png)
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572503850123264/1572503856078848/STEM/29cdece757b64f27b32e9052201c60c9.png)
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572503850123264/1572503856078848/STEM/da7e61a5d8ac4698aec6e7fa9a7536fe.png)
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572503850123264/1572503856078848/STEM/6d76d786a2a24d85be5acfafafea59bb.png)
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572503850123264/1572503856078848/STEM/3eac007c7c2341f983675ad1f8fb06b3.png)
(1)证明:
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572503850123264/1572503856078848/STEM/f4d027f4aadc4a479068148a96ee4eb6.png)
(2)设
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572503850123264/1572503856078848/STEM/ee0ea0770d2c4b828941ac2cb879eb1b.png)
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572503850123264/1572503856078848/STEM/12c63870f4774be3b4c5eb065bfad062.png)
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572503850123264/1572503856078848/STEM/814dfa17f4274df293ea236a2651fc7c.png)
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572503850123264/1572503856078848/STEM/814dfa17f4274df293ea236a2651fc7c.png)
![](https://img.xkw.com/dksih/QBM/2016/2/29/1572503850123264/1572503856078848/STEM/7348dcb74ded4b40b1b338eccc293299.png)
16-17高三上·河北石家庄·期末
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