Question

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

Answer 1

Step-by-step explanation:

diameter(d): 18

radius(r): 18 ÷ 2 = 9

area of a semi-circle:

$\frac{\pi {r}^{2}}{2}$

$= \frac{\pi \times 9 \times 9}{2} = 127.23$