Final answer:
The formula for the circumference of a circle is C = 2πr, where C represents the circumference and r is the radius of the circle.
Step-by-step explanation:
The formula for the circumference of a circle is given by the equation C = 2πr, where C represents the circumference and r is the radius of the circle. The value of π, which is a mathematical constant, is approximately equal to 3.14159. To find the circumference of a circle, simply multiply 2π by the radius of the circle.