# What is the Circumference of the Circle Below in Terms of pi (π)?

## (a) πr2       (b) 2πr      (c) πr

The circumference of a circle is the perimeter of the circle. It is the total length of the boundary of the circle

## Answer: The circumference of a circle can be calculated using the expression (b) 2πr

Let's look into the expressions given

## Explanation:

(a) πris used to calculate the area of a circle, where r is the radius

(b)  2πr is used to calculate the circumference of a circle, where r is the radius

(c)  πr is used to calculate the circumference of a semi-circle, where r is the radius