π
Pi Symbol (π)
Pi (π) is an irrational mathematical constant representing the ratio of any circle's circumference to its diameter, approximately equal to 3.14159.
Geometric Definition & Usage
Fundamental Constant
Pi is an infinite, non-repeating decimal. It appears in countless formulas across mathematics, physics, and engineering, particularly those involving circular shapes, spherical geometries, and wave mechanics.
Example Formula
The area of a circle with radius r is:
A = \pi r^2