The area of a circle whose diameter is 3 feet, is 7.07 sq feet.
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A 16-foot circle has an area of 201.06 square feet.
63.62 square feet.
The square foot area of a 41-foot diameter circle is: 1,320 square feet.
A 45-foot diameter circle has an area of 1,590.4 square feet.
Area of the circle in square feet: pi*radius squared