A=Pi(r)2 - A circle with a radius of 4 cm has an area of 50.27 square cm
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Area = Pi(r)2 - A circle with a radius of 12 centimeters has an area of 452.39 square centimeters.
The area of a circle with a radius of nine centimeters is: 254.5 cm2
The area of a circle whose radius is 19 centimeters is: 1,134 cm2
A circle with a radius of 18 centimeters has an area of 1017.88 square centimeters.
Use the formula for the area of a circle: A = pi x r2, where "r" is the radius.