Question

Find the perimeter of this semi-circle with diameter, d = 45cm. Give your answer rounded to 1 DP.

Answer 1

P = 70.6 cm

Explanation:

Given that,

The diameter of the semicircle, d = 45 cm

Radius, r = 22.5 cm

We need to find the perimeter of the semicircle. The formula for the perimeter of a semicircle is given by :

`P=\pi r\\\\P=\pi * 22.5\\\\P=70.6\ cm`

So, the required perimeter is 70.6 cm.