There are: pi*0.625^2 = 1.22718463 or about 1.227 square inches
A 4.75-inch diameter circle contains 17.72 square inches.
The circumference of a six-inch diameter circle is: 18.8 inches.
The circumference of 9 inch diameter circle is about 28.27 inches.
The circumference of a circle with a 20.5 inch diameter is 64.4 inches.
The circumference of a circle with a 39 inch diameter is 122.52 inches.
The circumference of a 6 inch diameter circle is: 18.8 inches. (diameter x Pi = circumference)
The area of a 3-inch diameter circle is about 7.068 square inches.
A circle with an 8-inch diameter has a perimeter of 25.1 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.
The area of a circle that has an 8.5 inch diameter is: 56.75 square inches.
The area of 3.5-inch diameter circle is: 9.621 square inches.