A area of the circle. C 4pA. BThe area of circle A is 9 times greater than URGENT ALGEBRA The formula for the circumference of a circle is C 2pir where r is the radius of the circle.
Spheres for n 2 are sometimes called hyperspheres.
The diameter like in a normal circle is just twice the. After converting the diameter to the radius you are ready to use the formula. Circumference of a Circle. We can solve for r to show an expression for the radius of a semicircle when given the area.