# Happy Pi (π) Day!

Happy Pi (π) Day!

March 14 (3/14), the first 3 digits of Pi (π) – 3.14.

π is one of the fundamental constants of mathematics: the ratio of a circle’s circumference to its diameter.

The mathematician Archimedes used polygons with many sides to approximate circles and determined that Pi was approximately 22/7

The symbol “π” was first used in 1706 by William Jones. A ‘p’ was chosen for ‘perimeter’ of circles, and the use of π became popular after it was adopted by the Swiss mathematician Leonhard Euler in 1737.

If you’d like to see the first million digits of Pi, check out **One Million Digits of Pi**.