**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.org 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.

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.

© Cathy Brown 1998 - 2022 © All images & Videos Cathy Brown 2021 Located in Sydney NSW Australia all rights reserved.

No unauthorised reproduction without written permission. Website design by Cathy L Brown

**Send me an email just in the Quick Message or send to:**

cathy@virtualteacher.com.au

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