A 25-foot radius circle is 1,963.5 ft2
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452 square feet.
The area of a circle is PI times the radius of the circle squared. The radius of a one foot diameter circle it 1/2 or .5 feet. .5 squared is .25 PI is 3.1416 3.1416 times .25 = .79 square feet So, there are about .8 square feet in a 1 foot diameter circle.
36 sq. feet
225 square feet
1,000 square feet.