已知扇形半径为10cm，圆心角为60°，则扇形弧长和面积分别为10π3cm，50π3cm210π3cm，50π3cm2．

Question

已知扇形半径为10cm，圆心角为60°，则扇形弧长和面积分别为

(10π)/(3)cm，(50π)/(3)cm2

(10π)/(3)cm，(50π)/(3)cm2

．

(10π)/(3)cm，(50π)/(3)cm2

(10π)/(3)cm，(50π)/(3)cm2(10π)/(3)10π10π33(50π)/(3)cm2(50π)/(3)50π50π33cm2cm22

(10π)/(3)cm，(50π)/(3)cm2

(10π)/(3)cm，(50π)/(3)cm2(10π)/(3)10π10π33(50π)/(3)cm2(50π)/(3)50π50π33cm2cm22

Answer 1

∵扇形的圆心角为60°，半径为10cm，
即扇形的圆心角α=(π)/(3)，r=10cm
故扇形弧长l=αr=(10π)/(3)cm
扇形面积S=(1)/(2)•l•r=(50π)/(3)cm2
故答案为：(10π)/(3)cm，(50π)/(3)cm2 (π)/(3)πππ333，r=10cm
故扇形弧长l=αr=(10π)/(3)cm
扇形面积S=(1)/(2)•l•r=(50π)/(3)cm2
故答案为：(10π)/(3)cm，(50π)/(3)cm2 (10π)/(3)10π10π10π333cm
扇形面积S=(1)/(2)•l•r=(50π)/(3)cm2
故答案为：(10π)/(3)cm，(50π)/(3)cm2 (1)/(2)111222•l•r=(50π)/(3)cm2
故答案为：(10π)/(3)cm，(50π)/(3)cm2 (50π)/(3)50π50π50π333cm2
故答案为：(10π)/(3)cm，(50π)/(3)cm2 2
故答案为：(10π)/(3)cm，(50π)/(3)cm2 (10π)/(3)10π10π10π333cm，(50π)/(3)cm2 (50π)/(3)50π50π50π333cm2 2