π

See also: Π [U+03A0 GREEK CAPITAL LETTER PI], ∏ [U+220F N-ARY PRODUCT], ㄇ [U+3107 BOPOMOFO LETTER M], 丌 [U+4E0C CJK UNIFIED IDEOGRAPH-4E0C], ㅠ [U+3160 HANGUL LETTER YU], and Appendix:Variations of "p"

π U+03C0, π
GREEK SMALL LETTER PI
← ο
[U+03BF] 		Greek and Coptic ρ →
[U+03C1]

Translingual
This mosaic is outside the mathematics building at the Technische Universität Berlin.
When a circle's diameter is 1 unit, its circumference is π units.
When a circle's radius is 1 unit, its circumference is 2π units.

Symbol

π

  1. (mathematics) An irrational constant representing the ratio of the circumference of a circle to its diameter; approximately 3.14159265.
  2. (particle physics) pion, pi meson
  3. (mathematics) homotopy group
  4. (mathematics) prime-counting function

See also

Greek

Letter

π • (p) (lowercase, uppercase Π)

  1. The lower case letter pi (πι), the 16th letter of the modern Greek alphabet.

Numeral

π'

  1. The number 80 in Greek numerals.

,π

  1. The number 80,000 in Greek numerals.
  2. (The Greek letter pi.)

See also
see: Appendix:Greek alphabet
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