问题
填空题
圆柱的底面积为S,侧面展开图为一个正方形,那么这个圆柱的侧面积是 ______.
答案
圆柱的底面积为S,所以底面半径为:
,底面周长为:2S π
;侧面展开图为一个正方形,Sπ
所以圆柱的高为:2
,所以圆柱的侧面积为:(2Sπ
)2=4πSSπ
故答案为:4πs
圆柱的底面积为S,侧面展开图为一个正方形,那么这个圆柱的侧面积是 ______.
圆柱的底面积为S,所以底面半径为:
,底面周长为:2S π
;侧面展开图为一个正方形,Sπ
所以圆柱的高为:2
,所以圆柱的侧面积为:(2Sπ
)2=4πSSπ
故答案为:4πs
选择合适选项补全对话。 | |
Zhou Li: Hi, Li Yang! Li Yang: What are they? Zhou Li: 2._ _ I have got four pictures. Li Yang: Look! This picture is good. . Zhou Li: Yes! 3. Li Yang: What about the other two pictures Zhou Li: 4.______ Li Yang: But I think they are very good. Zhou Li: 5. |