**Find the diameter of a circle with circumference of 25.56 units?**

circumference = 25.56

radius = 25.56 / ( 2 * PI )

radius = 4.0664

diameter = 4.0664 * 2

diameter = 8.1328

Circle is a perfect round shape.

where,

d = diameter

A = area

C = circumference

r = radius