名校
解题方法
1 . 如图,在四棱锥
中,
,
,
,
平面
,E为PD的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/b473418a-2d80-4fb1-bb41-57257e6b4a1f.png?resizew=159)
(Ⅰ)证明:
平面
;
(Ⅱ)若
,求点E到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/810227b082bd14dbcde85c3181841571.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/b473418a-2d80-4fb1-bb41-57257e6b4a1f.png?resizew=159)
(Ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31c34b18525831f3eda7bb90be0199b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/672757753ee4387ac9ce54467663a82c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
2021-08-12更新
|
1074次组卷
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7卷引用:云南省下关第一中学2020-2021学年高二上学期段考(二)数学(文)试题