**WHAT IS PI DAY – PI DAY = 3.14159265359…**

**PI DAY = 3.14159265359…**

Pi day is an annual celebration which is celebrated on the 14^{th} March.

It is observed on this day because this represents (the month/day format = 3/14) and this represents the first 3 significant numbers of pi.

**AND ITS EVEN MORE SPECIAL FOR THIS YEAR!!! **

If you round the first few digits up of Pi to 5 decimal places, it actually gives you 3.14.16 (third month/date/year). = 3.14159 = 3.1416

**WHAT IS PI? **

Pi is calculated to over one trillion digits beyond its decimal point.

Pi is used in mathematics to represent a “constant” (the ratio of the circumference of a circle to its diameter).

A diameter of a circle is the distance from one edge to the other edge which is measured straight through the centre of the circle.

The circumference of a circle is the distance all the way around the circle.

**HISTORY OF PI **

- Albert Einstein is born on the 14
^{th}March – the same day as Pi day. - The symbol was first used in 1706.
- The first person to use this symbol was William Jones.
- The symbol is a Greek letter.
- William Jones and his Circle – the man who invented Pi. He come up with the Pi symbol to represent a number that “can be approached, but never reached”.
- The letter ‘P’ was chosen to represent ‘perimeter’.
- Pi is calculated to over one trillion digits.
- Only 39 of the digits are needed to accurately calculate the spherical volume of the universe.

For more information about the history of Pi, check out the Historytoday.com website.

**PI QUESTIONS **

The diagram below shows a parallelogram.

The angles in the parallelogram are as follows:

2x + 40

3x – 30

2x + 4

4x – 28

Work out the value of x.

** Give us your answer in the comments below!**

**SOLVE THE PI QUESTIONS!**

Check out the following links for further interesting Pi questions:

**The Guardian** – Can you solve it: the PI Day Puzzle

**Pizza Hut** – Win **FREE **pizza!