The circumference of a circle is calculated using the formula C = 2πr, where C is the circumference and r is the radius of the circle.
If the radius of the circle is given as p, then we can substitute r with p in the formula:
C = 2πp
This means that the circumference of the circle, when expressed in terms of the variable p, is 2πp. So, if you know the radius of the circle, simply multiply that by 2 and then by pi to get the circumference.