Is Circumference pi•r^2? Help me out here!
No, it is either 2pi*r, or pi*d, area is pi*r^2.
No....you have the area formula for a circle
The circumference is : 2 * pi * r or, as sometimes written : pi * diameter
Actually, the formula for the circumference of a circle is 2(pi)(r).
It is easy to get this and the formula for calculating the area of a circle, pi(r)^2, confused since they use the same numbers.