α
Luas juring= _____ x Luas lingkaran
360 o
157 cm2 = 180 o
_____ x πr2
360 o
1/2 x πr2 = 157
1/2 314/100 x r2 = 157
r2 = 157/157x 100
r2 = 100
r = V100
r = 10
d = 2. r
= 2.10 cm
α
Luas juring= _____ x Luas lingkaran
360 o
157 cm2 = 180 o
_____ x πr2
360 o
1/2 x πr2 = 157
1/2 314/100 x r2 = 157
r2 = 157/157x 100
r2 = 100
r = V100
r = 10
d = 2. r
= 2.10 cm
Editor: Muhammad Khusaini