Question

The radius of a semicircle is $4$ feet. What is the area of semicircle? (Use $\pi =\frac{22}{7}$)

Answer 1

Area of the semicircle $=\frac{1}{2}\pi r^2$
Area $=\frac{1}{2}\times \frac{22}{7}\times 4^2$
$=25.14$ ft${}^2$