A 4.75-inch diameter circle contains 17.72 square inches.
A 72-inch diameter circle has an area of: 28.3 square feet.
A 20-inch diameter circle contains: 314.16 square inches.
A 48-inch diameter circle has an area of: 12.57 square feet.
The area of a 3-inch diameter circle is about 7.068 square inches.
19.63 square inches are in the area of a 5-inch diameter circle.
The area of a circle with an 8 inch diameter is approximately 50.27 square inches.
A 56-inch diameter circle has an area of about 17.06 square feet.
A 1.25-inch diameter circle contains 1.227 square inches.
In a circle with a diameter of 4, there would be approximately 12.56 square inches in the circle.