Circumference of a 21 Foot Diameter Circle
What is the circumference of a circle with a diameter of 21 ft? How far around is a circle that is 21 feet across?
Circumference of a 21′ diameter circle
|65′ 11.68″||feet and inches|
results may be rounded
Circumference of a Circle Formula
The circumference of a circle is pi times its diameter.
Circumference = π * Diameter
Diameter of a Circle
The diameter of a circle is the distance from one edge to the other, passing through the center. It is twice the radius.