SOLUTION: what is the equation for finding the diameter and radius of a circle when the area is given

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Question 75363: what is the equation for finding the diameter and radius of a circle when the area is given
Answer by ptaylor(2198) About Me  (Show Source):
You can put this solution on YOUR website!
what is the equation for finding the diameter and radius of a circle when the area is given

Area%28A%29+of+a+circle+=+pi%2Ar%5E2 so
A=pi%2Ar%5E2 divide both sides by pi
A%2Fpi=r%5E2 take square root of both sides
r=sqrt%28A%2Fpi%29---------------radius
r=d%2F2 so
d%2F2=sqrt%28A%2Fpi%29 multiply both sides by 2
d=2sqrt%28A%2Fpi%29---------------------diameter

Hope this helps---ptaylor