The area of a 10 foot circle is: 78.54 square units.
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78.53981634 or 79 square feet rounded to the nearest square foot.
The area of a 17-foot circle is: 227 square feet.
The square foot area of a 41-foot diameter circle is: 1,320 square feet.
The area of a circle with a 7-foot diameter is: 38.48 square feet.
Area of a circle = (pi) (radius)2Radius = 1/2 of diameterArea = (pi) (10)2 = 100 pi = 314.16 square feet (rounded)