Celebrated in countries that follow the month/day (m/dd) date format, because the digits in the date, March 14 or 3/14, are the first three digits of π (3.14), Pi Day was founded by Physicist Larry Shaw in 1988. Pi is represented by the lower case Greek letter, π, because it is the first letter of the Greek work περίμετρος, meaning perimeter.
One of the oldest and the most recognizable mathematical constant in the world, Pi (π) is the ratio of any circle’s circumference to its diameter. Its value is approximately equal to 3.14159265. It is an irrational Number, which means it cannot be expressed as a ratio of whole numbers, and its decimal representation never ends or repeats.
In recent years, mathematicians have called for replacing pi by tau (τ) as a way to describe the relationship between a circle’s circumference and its radius. In order to spread the word about the advantages of tau over pi, mathematicians around the world celebrate Tau Day on June 28.
How to Celebrate?
- Celebrate Pi Day by having lots and lots of pie.
- Wear a Pi t-shirt, Pi Scarf, or Pi Power Tie that has the numbers of pi on it or sport some pi shaped accessories.
- Eat foods that start with a pi, like pineapples and pizza or foods that are circular in shape like pancakes and cookies.
- Watch the 1998 Darren Aronofsky movie, Pi.
- Play Pizza Delivery Boy on the Wii
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