12.5/2 gives a radius of 6.25 inches
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The formula for area of a circle is: A = pi * r2 (area equals pi times radius squared) There fore if you plug in the numbers you know (pi = 3.14) you get 125 = 3.14 * r2 39.8 = r2 r = 6.31 inches
125
A circle of radius r has an area of Pi*r*r, where Pi is the constant which is approximately 3.14159.
Area of circle: pi*125 squared = 49,087 square feet rounded to the nearest whole number
There are 10 feet and 5 inches in 125 inches.