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.
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.
数学人气:226 ℃时间:2020-04-20 15:51:12
优质解答
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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