Question

aod is a sector of a circle, centre o, radius 4 cm. boc is a sector of a circle, centre o, radius 10cm. the shaded region has a perimeter of 18 cm. find angle aod

Answer 1

sorry dear I don't know tha answer

take care

Answer 2

Answer:

$\frac{3}{7}$ radians

Step-by-step explanation:

18 = (10θ + 2(10)) + (4θ + 2(4))

∴ 18 = 42θ

∴ θ = $\frac{3}{7}$ radians