diketahui sudut aob = 72 derajat jari-jari lingkarannya 7 cm Tentukan a luas lingkaran b luas juring poq

Luas = 22/7 × 7×7
= 154
Luas juring = 72/360 × 154
= 30, 8

Maaf klu Salah

< AOB = 72°
r = 7 cm

a) L
b) L juring AOB

a)
L = phi × r^2
L = 22/7 × 7 × 7
L = 154 cm^2

b)
L juring AOB = < AOB/360° × L
L juring AOB = 72°/360° × 154
L juring AOB = 1/5 × 154
L juring AOB = 30,8 cm^2