Question

Find the area of the sector of a circle with radius 4 cm and angle ${90}^o$.

• A. $1\pi c{m}^2$
• B. $2\pi c{m}^2$
• C. $3\pi c{m}^2$
• D. $4\pi c{m}^2$

Answer 1

The correct option is D $4\pi c{m}^2$

The area of a sector with given radius and angle is :

$\frac{n}{360}\pi r^2$
$=$ $\frac{90}{360}\pi 4^2$
$=$ $4\pi c{m}^2$