Area = pi*r2
Area = pi(12 inches)2
= 452 inches squared
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Area = Pi(r)2 - A circle with a radius of 25 inches has an area of 1,963.5 square inches.
Area = Pi(r)2 - A circle with a radius of 12 inches has an area of 452.39 square inches.
pi*25 = 78.5.
The area of a circle if the radius is 2.5 inches is: 19.63 square inches.
The radius of a circle with an area of 380 sq inches is 11 inches.