Circumference = 2*pi*r = 12
So radius r = 6/pi
Therefore area = pi*r2 = 36/pi = 11.46 sq inches, approx.
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2 inch radius = 12 9/16" circumference & an area of 12.56637 sq. inches.
well the formula is 2 pie r
Circumference = 37.7 inches Diameter = 12 inches
12/pi inches, about 3.5 inches
Circumference of a circle = 2*pi*radius or pi*diameter