名校
解题方法
1 . 如图,在四棱锥
中,底面
是菱形,
,
,
.
![](https://img.xkw.com/dksih/QBM/2021/3/23/2683899555274752/2683957273624576/EXPLANATION/694cfa39a3af44b09b49c20ee3c18a29.png?resizew=168)
(1)证明:
平面
.
(2)若四棱锥
的体积为12,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bbd7c2767c106faf27d6a97ebc8e739.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aed0a2d9c31c86f12428a72e1b81a77.png)
![](https://img.xkw.com/dksih/QBM/2021/3/23/2683899555274752/2683957273624576/EXPLANATION/694cfa39a3af44b09b49c20ee3c18a29.png?resizew=168)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
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2021-03-23更新
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5卷引用:四川省宜宾市叙州区第一中学校2023-2024学年高二上学期开学考试数学试题