# Life of Pi

March 10, 2014

## Happy International Pi Day!

International Pi Day will be celebrated this Friday, 14th March.

The number π is 3.141592 (to the first six decimal places), so the fourteenth of March, or 3.14, in its American date format, is celebrated as International Pi Day.

Pi is the ratio of a circle’s circumference to its diameter. It doesn’t matter how big or small the circle is, the ratio will always be the same. Mathematicians have known that a circle’s circumference is always just a little more than 3 times the size of its diameter for thousands of years but is wasn’t until 1706 that this number, which has since been calculated to its trillionth decimal place, was given the name ‘Pi’ and the Greek symbol π assigned to it by the mathematician William Jones.

You can find out more about Pi here.

And use π in these worksheet packs:

****WIN****

We are celebrating by automatically entering our customers into a prize draw to win a £25 Amazon voucher with every purchase*. There is also 31.4% off all orders until the end of March when you enter the code LIFEOFPI at the checkout.

*excludes free samples. Competition ends 31

^{st}March. The winner will be notified by email on 1

^{st}April.