一个圆柱的侧面积展开图是一个正方形,这个圆柱的高是12.56cm,它的表面积是多少平方厘米?
一个圆柱的侧面积展开图是一个正方形,这个圆柱的高是12.56cm,它的表面积是多少平方厘米?
数学人气：660 ℃时间：2020-04-19 02:04:24
优质解答
3.14×（12.56÷3.14÷2）²+12.56=25.12平方厘米
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