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Celebrate Pi Day -- March 14


celebrate Pi Day 14 March
What is Pi? Pi (π) is approximately 3.14159, the mysterious mathematical constant which represents the ratio of any circle's circumference to its diameter. I say "approximately" because Pi itself is what is termed an "irrational number". That means it never repeats or ends. It keeps going and going forever.

Pi Day is celebrated on March 14 (3/14) each year in honour of Pi. It was first founded in 1988 at the Exploratorium in San Francisco by physicist Larry Shaw, and in 2009 the US House of Representatives designated March 13 as "National Pi Day". On Pi Day, math nerds everywhere celebrate the beauty of Pi's infinite progression of numbers. Schools around the nation take the occasion of the holiday to explore the significance of this number. It is currently treated as a day of mathematics, fun, and an excuse to have more pie.

How many digits of Pi do you know?

To 550+ digits:

To one million digits and still going strong  ...

How to estimate Pi:

Pssst! Your math geek is showing.

The numeric character reference in HTML for Pi is Π (displays as "π").

Say it in maths:

Area of a circle = πr2
Circumference of a circle = 2πr (where "r" = radius)

Pi crafts:

Five foods to eat while celebrating Pi Day:

Round foods are of course best for this purpose, taking the time to calculate both the area and circumference of the circular food in question.

  1. Pie (any type of pie will do)
  2. Pizza pies
  3. Cookies and cakes with a "pi" symbol on the top in icing
  4. Coffee, pie, and doughnuts, which is a mnemonic for the equation Circumference equals (Pi multiplied by Diameter) => C = πd (Coffee, Pie, Donuts)
  5. Any other round food will work in a pinch. M&Ms, Skittles, round cereals ...

About Pi and Pi Day