Answer:
The answer is A
Step-by-step explanation:
A * 2 = 1/2πr^2 * 2
2A / π = πr^2 / π
[tex]\sqrt{\frac{2a}{\pi } }[/tex]= [tex]\sqrt{r^2}[/tex]
So, the answer is A because r = [tex]\sqrt{\frac{2a}{\pi } }[/tex]
