Question

Find the area of this semi-circle with diameter 18
Give your answer rounded to 2 DP.

Answer 1

Explanation:

diameter(d): 18

radius(r): 18 ÷ 2 = 9

area of a semi-circle:

`\frac{\pi {r}^(2)}{2}`

`= (\pi * 9 * 9)/(2) = 127.23`