Question

Tlong yg no 9 and 11 dngan cara

Answer 1

9. L 1 = phi × r × r
L = 3,14 × 10,5 × 10,5
L = 346,185 cm^

L2 = phi × r × r
L = 3,14×5×5
L= 78,5

L keseluruhan = L1 + L2

L bangun yg di arsir = L1 - L2

11. L1 = phi × r × r
L = 22/7 × 14 × 14
L = 616cm^

L2 = phi × r × r
L = 22/7 × (14×2) × (14×2)
L = 22/7 × 28 × 28
L = 2464cm^

L keseluruhan = (L1 × 2) + L2