Area of a circle = pi*radius2
Area = 314.159 square feet to 3 decimal places.
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A circle with a radius of 30 feet has an area of 2,827.43 square feet.
A circle with a radius of 4.3 feet has an area of 58.09 square feet.
Area of circle = PI * radius^2, so PI * 6^2 = 113.09733553 square feet.
The radius of a circle is the distance from the center of the circle to any point on its circumference. In this case, if the circle has a diameter of 20 feet, the radius would be half of that, which is 10 feet. So, the radius of a 20 ft circle is 10 feet.
The area is 441 times pi.