Question

Tolong yaa
Terima kasih

Answer 1

L 1/2 lingkaran besar - L 1/2 lingkaran kecil
= 1/2 × phi × r^2 - 1/2 × phi × r^2
= 1/2 × 3,14 × 10^2 - 1/2 × 3,14 × 5^2
= 1/2 × 3,14 × 100 - 1/2 × 3,14 × 25
= 157 - 39,25
= 117,75 cm^2