**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.

- 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

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