名校
解题方法
1 . 如图,四棱锥
的底面
是菱形,
,
平面
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/adf815b3-05d1-41db-b4f7-985ff1870fab.png?resizew=167)
(1)证明:
平面
;
(2)若
,求四棱锥
的侧面积.
![](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/71a46dc0bb5d8fa33583817e530a5d21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/adf815b3-05d1-41db-b4f7-985ff1870fab.png?resizew=167)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/662698361c6b3ddaf0c28a3c87be53e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83a04565a8ebaa111894b724b0ba266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
您最近一年使用:0次
2020-08-14更新
|
1078次组卷
|
5卷引用:安徽省马鞍山市2020届高三第三次教学质量监测文科数学试题
安徽省马鞍山市2020届高三第三次教学质量监测文科数学试题(已下线)专题8.5 直线、平面垂直的判定及性质(精练)-2021年新高考数学一轮复习学与练江西省南昌市第十中学2021届高三上学期期中考试数学(文)试题普通高等学校招生国统一考试2020-2021学年高三上学期 数学(文)考向卷(五)(已下线)专题34 立体几何解答题中的体积求解策略-学会解题之高三数学万能解题模板【2022版】
解题方法
2 . 如图,四棱锥
的底面是正方形,
为
的中点,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/219a5232-8e86-4a15-9bcc-a246b0f00165.png?resizew=169)
(1)证明:
平面
.
(2)求三棱锥
的侧面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19a4b8b69b419c557ba61a2bdfaf4066.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdf359f763ba9cecb6086408c91db6e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1364213f546b37f8764ddcb59e36ae4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e0f73b3c63084d9c032802e01f9a168.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1b638760d907efe836500581da1596.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/219a5232-8e86-4a15-9bcc-a246b0f00165.png?resizew=169)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/399ca97f2ce0c4f8fcf1d1cb8b3a3cec.png)
您最近一年使用:0次
2020-05-02更新
|
532次组卷
|
3卷引用:陕西省汉中市重点中学2019-2020学年高三下学期4月开学第一次联考数学(文)试题