There are about 38.48 square feet in a 7' diameter circle
The circumference of a circle with a diameter of 20 feet is: 62.83 feet (diameter x Pi = circumference).
A 45-foot diameter circle has an area of 1,590.4 square feet.
A circle that has an area of 78.5 square feet has a diameter of 10 feet.
The area of a circle with a diameter of 8 feet is: 50.27 square feet.
The area of a circle that has a diameter of four feet is: about 12.57 square feet.
A circle with a diameter of 6 feet has an area of 28.27 square feet.
The area of a circle, if the diameter is 4.3 feet, is: 14.52 square feet.
A 72-inch diameter circle has an area of: 28.3 square feet.
A 48-inch diameter circle has an area of: 12.57 square feet.
The diameter is 4.222 feet.
The area of a circle with a diameter of 26 feet is: 530.9 square feet.