SOLUTION: The area of a circle is 20 pie. Find the radius in simplest form?

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Question 2185: The area of a circle is 20 pie. Find the radius in simplest form?
Answer by longjonsilver(2297) About Me  (Show Source):
You can put this solution on YOUR website!
area = pi*r^2
20pi=pi*r^2
so r^2 = 20
r=sqrt%2820%29 ignoring the -ve version
r= sqrt%284%2A5%29%29
r= sqrt%284%29%2Asqrt%285%29%29
r = 2sqrt%285%29%29
Jon