So where you want to start is the basic calculation, Area = [tex] \pi [/tex] r[tex] x^{2} [/tex], but work backwards, since you already know your area.
A=[tex] \pi[/tex]r[tex] x^{2}[/tex]
300cm[tex] x^{2} [/tex] = (3.14159)(r)^2
Now divide area (300) by pi.
95.49297 = r[tex] x^{2} [/tex]
then find the square root of the number on the left side of the (=) sign (95.49297). You should get:
9.77205 = r
Now that you know your radius, you can plug this value into the basic circumference calculation, c = 2(pi)r.
c = 2(pi)9.77205
c = 61.3996
Simplify the amount of numbers after the decimal, and remember the value is no longer measured in cm/squared, but just cm because we're now talking about length.
Good luck!
