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Q: How many square feet are in a 40 foot radius circle?

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A = 1,767,100 square feet.

452 square feet.

Area of the circle in square feet: pi*radius squared

A 25-foot radius circle is 1,963.5 ft2

Area of a circle with a 4 feet radius = 16*pi square feet

Area of circle: pi*22 squared = 484*pi square feet

Area of the circle in square feet = pi times radius squared

28.27 ft2

78.54 ft2

You want the area of a circle, which is pi*r2 Just make sure your radius (r) is in feet and you answer will be 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.

The area of a circle is computed by the formula A = pi * r2 (r is the radius of the circle)For a 20 foot circle, the radius is 10 feet and the area is 314.16 square feet.

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