What is the circumference of a circle when the diameter is 18?

If the diameter is given, let us see how to calculate the circumference of the circle.

Circumference of a circle = 2 × pi × radius

2× radius = diameter

So, the circumference of a circle in terms of diameter = diameter × pi

pi (π is the mathematical constant whose value is approximated to be 3.14)

Circumference of a circle  whose diameter is 18 

= 18 × 3.14 

= 56.52

Therefore, the circumference of the circle when the diameter is 18 is 56.52 units.

What is the circumference of a circle when the diameter is 18?

Summary:

The circumference of the circle when the diameter is 18 is 56.52 units.