解题方法
1 . 如图,在四棱锥
中,底面ABCD是矩形,
平面ABCD,且
,
,
,E为PD的中点.
![](https://img.xkw.com/dksih/QBM/2022/4/20/2962149527773184/2963215974440960/STEM/e11a6d39-5e09-4939-a563-5bda4f626e10.png?resizew=178)
(1)求证:
平面ACE;
(2)求四棱锥
的侧面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab2c27eac56fffa4cd7dbe1dcdf1a.png)
![](https://img.xkw.com/dksih/QBM/2022/4/20/2962149527773184/2963215974440960/STEM/e11a6d39-5e09-4939-a563-5bda4f626e10.png?resizew=178)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acf2bc3dd1f1ae5d5e28b0366f454ec1.png)
(2)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
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2022-04-21更新
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3卷引用:云南省西双版纳州2022届高三高中毕业班第二次适应性测试数学(文)试题