Question

Jika panjang OA ,= 6cm dan panjang busur AB = 5cm. Maka luas juring OAB adalah

Answer 1

Verified answer

LINGKARAN
• busur dan juring

r = 6 cm
b = 5 cm
j = __?

juring
j = θ/360° × π r²

busur
b = θ/360° × 2π r

bandingkan
j / b = r / 2
j = b r / 2
j = (5 cm) (6 cm) / 2
j = 15 cm²