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14th of March is Pi Day!
Happy 3.14159265358979323846264338327950288419716939... Day!

I do so love a good Pi, irrationally so, that is why I always celebrate PI DAY.
For one thing, it's constant.
Pi (π) is the ratio of a circle’s circumference to its diameter. By measuring circular objects, it has always turned out that a circle is a little more than 3 times its width. The mathematician Archimedes used polygons with many sides to approximate circles and determined that Pi was approximately 22/7.
William Jones first used the symbol for Pi, the Greek symbol “π”, in 1706. In recent years, Pi has been calculated to over one trillion digits beyond its decimal.


piday is a site dedicated to all things Pi. There is a countdown to Pi day, Teacher resources, a quiz and videos. I particularly liked the Happy Pi Dau video.
Check out the 1 million Digits of Pi on this site.



The Exploratorium Pi Day – lots of easy activities and more links. The activities can be dowloaded as Pdfs. There is also a good history of PI.



How to Calculate Pi by Throwing Frozen Hot Dogs
Believe it or not, of all the countless ways to approximate
the most prolific irrational number in the universe, there are
none quite as interesting or as surprisingly satisfying as
throwing perfectly good food around.


Pi dayl

Pinterest – Shari Bithell’s Pi Day Activities - Some great
ideas here. Great images it. Take a look at the chickens
and the PI in the Sky.


Skip intro/replay link: 0:47. This is a music video of the song "Mathematical Pi" by Ken Ferrier and Antoni Chan.

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