Area of a circle = pi*radius2
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Area = 176.71 feet2
assuming that 15 x 15 are the dimensions of the square that ensconces the circle in question. This means that the diameter of the circle is fifteen feet. Therefore the radius is 7.5'. area = pi x rr area = 3.14 * 7.5 *7.5 area = 176.715 m**2
A 15-foot wide circle has an interior area of 176.71 square feet and a distance around the outside (circumference) of 47.1 feet.
Area of 3/5 of a circle: 3/5*pi*15^2 = 135*pi square feet
A circle with a radius of 35 feet has an area of 3,848.45 square feet.