Jawabanmu

2014-05-02T13:19:16+07:00
D = 220 : 22/7 = 220 x 7/22 = 70 cm. r = 35 10/220 x 360 = 16,36 derajat. Luas juring = 16,36/360 x (22/7)(35x35)= (sudut juring/sudut total x L lingkaran ) 0,045 x 3850 = 173,25 cm2