10x10 = 100
100 x pi, or 100 x 3.14159 = 314.16 square inches
one square foot = 1296 square inches
314.16 / 1296 = .242 square feet
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If the radius of a circle is 80 inches, then the area of the circle is 139.6263 square feet. (rounded)
A circle with a radius of 80 inches has an area of 139.6 square feet A circle with a circumference of 40.5 feet has an area of 130.5 square feet
961 pi square inches
Change the inches into feet and use the area formula for a circle: pi*radius squared
The radius is 72 inches.