pi

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

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Pi

• enPR: pī, IPA ^(key): /paɪ/
• SAMPA: /paI/

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• Homophone: pie

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.