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  Wikipedia: Pi (letter)

Wikipedia: Pi (letter)
Pi (letter)
From Wikipedia, the free encyclopedia.

Pi (Π π) is the 16th letter of the Greek alphabet and has a numeric value of 80. In words it is pronounced /p/.

The upper-case letter Π is used as a symbol for:

The lower-case letter π is used as a symbol for:
  • The mathematical constant &pi  3.14159, being the ratio of a circle's circumference to its diameter.
  • The prime counting function in mathematics.
  • The pi mesons in particle physics.
  • Profit in economics.

  

From Wikipedia, the free encyclopedia. 
Modified by Geona