Pi Symbol

The Greek letter π (pi) is used in trigonometry as a constant to represent a half-rotation around a circle in radians. The value of π is approximately 3.14 and appears in the geometric formulas for finding the circumference and area of the circle. The value of π can be calculated by dividing any circle's circumference by its diameter.

Format Display Data
Image Pi Symbol (π) Download SVG ↓
TeX
\pi
Unicode π
960

Usage

Area of Circle | Formula

The area of a circle is given by π (pi) times the radius of the circle squared.

Circumference of Circle | Formula

The circumference of a circle is given by two multiplied by pi and the radius.

Pi | Concept

The greek letter π (pi) is a naturally occuring number that is defined by any circle's circumference divided by its diameter.

Related Symbols

Tau | Symbol

The Greek letter τ (tau) is used in trigonometry as a constant to represent a full rotation around a circle in radians. The value of τ is approximately 6.28 and can be calculated by dividing any circle's circumference by its radius.