A=pi x radius squared
Example: circle with a radius of 2 would be worked out like this: 2 squared (4) x 3.14.
Answer= 12.56
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Divide the area by pi and then square root it this will give the radius of the circle.
Area = pi*radius2 So, radius = sqrt(area/pi)
Half the square root of the square radius equals the circle radius.
it is square root of the area divided by pi
Square root (Area/pi) to get the radius Then 2xRadiusxPi= Circumference