Answer: [tex]\sqrt{\frac{A}{\pi } }[/tex] = r
Step-by-step explanation:
The goal in this problem is to isolate the single variable, r. The original equation is A = pir^2. The first step to attempt to get r on its own is to divide each side of the equation by pi.
A = pir^2
A/pi = pir^2/pi
A/pi = r^2
Next, find the square root of each side to get r on its own:
A/pi = r^2
sqrt(A/pi) = sqrt (r^2)
[tex]\sqrt{\frac{A}{\pi } }[/tex] = r
