Question

(i) Calculate the perimeter and area of the semicircle whose radius is 14 cm.
(ii) Calculate the perimeter and area of a quadrant circle of radius 7 cm.

Answer 1

1. Radius $=14$cm

Then, $Area=\pi r^2=\frac{22}{7}\times 14\times 14=616c{m}^2$

$Perimeter=2\pi r=2\times \frac{22}{7}\times 14=88cm$

2. Radius $=7$cm

Then, $Area=\pi r^2=\frac{22}{7}\times 7\times 7=154c{m}^2$

$Perimeter=2\pi r=2\times \frac{22}{7}\times 7=44cm$