Pi symbol

Pi Day

By Timothy Evans
  • 100

    First Discovery of Pi

    Pi was discovered about 2000 BC by the ancient Babalonians.
  • 200

    Egyptians get a more approximation for Pi

    In 1650 BC, the Egyptians calculated Pi to approximately 3.16
  • 300

    Archimedes and Pi

    Archimedes discovers an even closer approximation of Pi in 282 BC. He claimed that it's true value lies between 3 and 1/7 and 3 and 10/71.

  • Pi Symbol

    Mathematicians began using the Pi symbol known today in the 1700's.

  • Leonhard Euler and Pi

    Leonhard Euler popularized the use of Pi in his studies in Geometry.

  • D.F. Ferguson and Pi

    D.F. Ferguson was able to approximate Pi to 808 digits.

  • John Wrench and Daniel Shanks and Pi

    John Wrench and Daniel Shanks discovered over 100,000 digits of Pi.

  • Eugene Salamin and Pi

    Eugene Salamin discovered a more efficient way to approximate Pi. His method is still used today.

  • Pi Day is first celebrated

    This is the first celebration of National Pi Day. Larry Shaw is credited with organizing the first celebration.

  • Zu Chongzhi and Pi

    Zu Chongzhi discovered that Pi is even more accurate when approximated by 355/113