The square foot area of a 41-foot diameter circle is: 1,320 square feet.
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The area of a circle with a 7-foot diameter is: 38.48 square feet.
A 45-foot diameter circle has an area of 1,590.4 square feet.
Area of a circle in square feet = pi*radius2
Area of a circle in square feet = pi*radius2
78.53981634 or 79 square feet rounded to the nearest square foot.