# pi

Οο${\displaystyle \longleftarrow }$ 16 ${\displaystyle \longrightarrow }$Ρρ

The Simple English Wikipedia has an article on:

## Noun

1. Pi is a Greek letter written "π".
2. (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 ${\displaystyle {\tfrac {355}{113}}}$ , or rough approx as ${\displaystyle {\tfrac {22}{7}}}$ ). It is usually written as "π"
The distance around a circle is twice the radius times pi; C = 2πr.