What is the relationship between diameter and circumference?

Answer 1

The distance across a circle through the center is called the diameter. The distance around a circle is called the circumference. Pi is the ratio of the circumference of a circle to the diameter. So,

2 radius x Pi = circumference

Pi is approximately 3.14159265358979323846...

Answer 2

linear. As the diameter of circle increases the circumference of that circle increases. Diameter x pi = Circumference, Diameter x 2 x pi = Circumference x 2.

Answer 3

diameter = pi x circumference (pi = 3.1416 approximately)

To find circumference, multiply diameter by pi.

To find diameter, divide circumference by pi.