一扇形的半径是5cm，圆心角是60°，则此扇形的面积是______ cm2；周长是______ cm．
人气：277 ℃ 时间：2020-04-20 15:51:12
解答
扇形的面积是
πr
2=
≈13.08cm
2．
扇形的周长是C=
π×5+5×2=
π+10≈15.23cm．
故答案为：13.08.15.23．
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