Question

If a semi circle has a diameter of 4cm then what is the perimeter?

Answer 1

Hey!

Given,

$d = 4 \: cm \\ r = 2 \: cm$

We have to find the circumference ( perimeter ) of the circle so,

$circumference \: = 2\pi {r}^{2}$

$2 \times \frac{22}{7} \times2 \\ \frac{88}{7} \\ = 12.57 \: cm$