Pi or π is a mathematical constant which represents the ratio of any circle's circumference to its iameter in Euclidean geometry, which is the same as the ratio of a circle's area to the square of its radius. It is approximately equal to 3.14159. Pi is one of the most important mathematical constants: many formulae from mathematics, science, and engineering involve π.

Trivia about pi

  • A 2005 sale of 14,159,265 shares prompted the headline "Google offers shares, seeks global piece of" this
  • The phrase "How I want a drink, alcoholic of course" is often used to help memorize this
  • Archimedes figured this value to be between 3 1/7 & 3 10/71
  • Take any circle, divide the circumference by the diameter, and you'll get this
  • For geometry, you'll need to swallow this, the ratio of the circumference of a circle to its diameter
  • First used in 1706 by William Jones, it's the symbol for the ratio of the circumference of a circle to its diameter
  • Greek letter you need to know to figure out the area of a circle
  • It's both a math term & the 16th Greek letter
  • In the 1730s Leonhard Euler made this delicious Greek letter the standard symbol for a familiar ratio
  • Devotees of this celebrate its irrational existence each 3/14 at 1:59 P.M.
  • It's approximately equal to 3.14
  • A Greek symbol serves as the title of this 1998 film about an eccentric math whiz
  • The 16th letter of the Greek alphabet, it runs circles around the rest
  • Kate Bush sang over 100 digits about this symbol, the ratio of the circumference of a circle to its diameter
  • If a circle has a radius of 7.3 inches, its circumference in inches is 2 X 7.3 X this
  • In 2002 a team at the University of Tokyo calculated this to 1.2411 trillion digits after the decimal point
  • It's not the 3.14th letter in the Greek alphabet--it's the 16th
  • According to the TV show title, it was Thomas Magnum's profession
  • The ratio of the circumference of a circle to its diameter
  • A tiger named Richard Parker shares a life raft with a boy in Yann Martel's "Life of" him
  • This 2-letter word is the ratio of the circumference of a circle to its diameter
  • In 1706 William Jones made this the symbol of the ratio of a circle's circumference to its diameter
  • Nitrogen molecules are linked by 2 bonds called this, the ratio of a circle's circumference to its diameter
  • The 16th letter of the Greek alphabet, it's also a math term
  • The 2002 prize went to Yann Martel's bestseller "Life of" this