In a circle, Area = pi times radius squared:
A = (pi)(r^2)
Since the diameter equals 2 inches, the radius is one inch:
A = (pi)(1^2)
A = pi = 3.14 inches squared
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Area = (pi) x (1/2 of the diameter)2 11-inch diameter ==> 95.033 square inches of area (rounded)
Area of circle: pi*10^2 = 100*pi square inches
The Diameter of a Circle is twice the Radius.thus for a 52 inch Diameter Circle the Radius will be 52/2=26 inches.
Area = Pi(d/2)2 = Pi*6.52 = approximately 132.73 inches2
Area of circle or radius r = pi*r*r = pi*3.5/2*3.5/2 = 9.62 square inches.