Question

Find the area of sector of circle  of radius 21 cm and central angle 120⁰.

Answer 1

Area of a sector of a circle =  \[\frac{\theta}{360} \times \pi r^2\]

\[= \frac{120}{360} \times \pi \left( 21 \right)^2 \]
\[ = 462 {cm}^2\]