Question

find the area of the semicircle round to the nearest tenth use 3.14 for pi do not include units with your answer 12 in

Answer 1

226.08

1) Since the area of the semicircle is half the circle area, then we can write:

`S=(1)/(2)\cdot\pi\cdot r^2`

2) So we can plug into that the size of that radius:

`\begin{gathered} S=(1)/(2)\cdot\pi\cdot(12)^2 \\ S=(1)/(2)\cdot\pi\cdot144 \\ S=72\pi\Rightarrow S=72*3.14\Rightarrow S=226.08 \end{gathered}`

3) Hence, the area of that semicircle is 226.08 in²