Area of a circle = pi*radius2
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Pi x Diameter = CircumferencePi = 3.14...
Because the circle is measured in square units.
Area of a circle = pi*r2 Area = pi(12 in)2 ( 144 * pi ) = 452 in2 =======
Area = (pi) (radius)2 = 225 pi = 706.858 square centimeters (rounded)