It is also a transcendental number, meaning that it is not the root of any non-zero, polynomial that has rational coefficients.

π is an irrational number meaning that it cannot be expressed exactly as a fraction (though it is often approximated as 22/7) and its decimal representation never ends or has a permanent repeating pattern. All of these values are related through the mathematical constant π, or pi, which is the ratio of a circle's circumference to its diameter, and is approximately 3.14159. The circumference of a circle can be defined as the distance around the circle, or the length of a circuit along the circle. Essentially, the diameter is twice the radius, as the largest distance between two points on a circle has to be a line segment through the center of a circle.

The distance between any point of a circle and the center of a circle is called its radius, while the diameter of a circle is defined as the largest distance between any two points on a circle. It can also be defined as a curve traced by a point where the distance from a given point remains constant as the point moves. It is a set of all points in a plane that are equidistant from a given point, called the center.

While a circle, symbolically, represents many different things to many different groups of people including concepts such as eternity, timelessness, and totality, a circle by definition is a simple closed shape. Please provide any value below to calculate the remaining values of a circle. Home / math / circle calculator Circle Calculator

Circumference of a circle