# pi

### PronunciationEdit

## NounEdit

**Pi**is a Greek letter written "**π**".- (
*mathematics*)**Pi**is a number that is found by dividing the circumference of a circle by its diameter. Pi is constant, it is always the same (close to 3.14159 , also accurate approx as , or rough approx as ). It is usually written as "**π**"*The distance around a circle is twice the radius times***pi**; C = 2πr.