名校
解题方法
1 . 已知四棱锥
(图1)的三视图如图2所示,
为正三角形,
垂直底面
,俯视图是直角梯形.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/12/ce9a0c19-ac00-4486-83d7-9eee7e69f00e.png?resizew=351)
(1)求正视图的面积;
(2)求四棱锥
的体积;
(3)求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/12/ce9a0c19-ac00-4486-83d7-9eee7e69f00e.png?resizew=351)
(1)求正视图的面积;
(2)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
您最近一年使用:0次
2016-12-04更新
|
955次组卷
|
3卷引用:【全国百强校】内蒙古集宁一中2018-2019学年高一12月月考数学试题