Question

i would like some help with this, i would like a detailed explanation please

Answer 1

Radius of circle = 9 ft.

Minor angle (Angle ABC belonging to minor sector) = 30°

Major angle = 360°-30°= 330°

Area of shaded region =

$\frac{ \theta}{360} \times \pi {r}^{2} \\ \\ \frac{330}{360 } \times \pi \times 9 \times 9 \\ \\ 74.25\pi \: {ft}^{2}$

Length of ADB =

$\frac{ \theta}{360} \times \pi \times 2r \\ \\ \frac{330}{360} \times \pi \times 2 \times 9 \\ \\ 16.5\pi \: ft$