By using the formula: area of circle = pi*radius2
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Area of the circle in square inches = pi*82
im assuming your circle has a diameter of 1/4 inches to find sq in just find the area since the area is the definition of square inches. area = (3.14159) * (.252) = 0.196349375sq in
About 153.86 square in. To find out the area of a circle do: r^2*pi.
Circumference = 31.4 inches, approx. Area = 78.5 square inches, approx.
First find the radius = 12/(2*pi) = 1.909859317 inches Area = pi*1.9098593172 = 11.4591559 or about 11.5 square inches