名校
1 . 在直角梯形ABCD中,
,
,
,
,以AD所在的直线为轴,其余三边旋转一周形成的面围成一个几何体,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae79b7d1fc4131ae3b9de76e2fa45e5f.png)
A.该几何体为棱台 |
B.该几何体的母线长为![]() |
C.该几何体的表面积为![]() |
D.该几何体的体积为![]() |
您最近一年使用:0次
2023-10-24更新
|
428次组卷
|
2卷引用:内蒙古呼和浩特市第二中学2023-2024学年高二上学期10月月考数学试题
名校
2 . 如图圆台的上、下底面半径分别是
和
,它的侧面展开图的扇环的圆心角是
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/30a441a2-9af5-4947-af83-132eacc72507.png?resizew=131)
(1)求圆台母线
的长度.
(2)求圆台的表面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6293f10977e09f6bf2be1c49fb2c874.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0731be9fc9a06a97db4857ccd2240772.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54e7a123c9cc0e058db28841fb0edcf3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/30a441a2-9af5-4947-af83-132eacc72507.png?resizew=131)
(1)求圆台母线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)求圆台的表面积.
您最近一年使用:0次