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

Answer»

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


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