The area of a circle is measured in square units.
The formula is: pi*radius2
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The area of a circle is pi * radius2. If you already have the radius squared, you just have to multiply that by pi.
Find the radiusMultiply pi by the square of the radius.
The formula for finding the area of any circle is pi*radius2..
A=pi x d squared or you can get the radius by dividing by 2 and A=2 x (pi x r squared)
Area of a square = side squared Area of a circle = pi times radius squared