# It's National Pi Day!

##### What is Pi?

Written as 3.14, pi is a number representing the ratio of a circle's circumference to its diameter. We calculate the circumference of a circle by multiplying its diameter by pi. Pi is thought to be a special number because it is an irrational number, meaning that it can't be expressed as a simple fraction. Mathematicians, scientists and other curious people have been fascinated by pi for hundreds of years trying to determine whether there is a pattern to its digits or whether they are completely random.

Well, to be a bit more exact, the number is 3.14159265358979323846264338327950288419716939937510
58209749445923078164062862089986280348253421170679... we can TRY to be MORE precise but pi literally goes on forever!

##### Why do we celebrate National Pi Day?

National Pi Day came about in 2009 to promote mathematics. Our SmilesForever Orthodontics staff loves Pi Day because many businesses celebrate with pie. Yes - THAT pie! Pizza, fruit, cream, pumpkin, sweet potato, yummy, braces-friendly PIE!

##### A Yummy Local "Pi" Deal

We found out at lunch that, today only, Bojangles restaurant is offering THREE of their yummy sweet potato pies for \$3.14 in celebration of National Pi Day!

##### Five Fun Pi Facts
1. Albert Einstein was born on pi day in 1879.
2. Pi is the number of times that a circle's diameter will fit around a circle's circumference.
3. The first 31 digits of pi contain NO zeroes.
4. Without knowing the true value of pi, it's impossible to find the circumference of a circle.
5. In the first 6,000,000,000 numbers of pi:
• 0 occurs 599,963,005 times
• 1 occurs 600,033,260 times
• 2 occurs 599,999,169 times
• 3 occurs 600,000,243 times
• 4 occurs 599,957,439 times
• 5 occurs 600,017,176 times
• 6 occurs 600,016,588 times
• 7 occurs 600,009,044 times
• 8 occurs 599,987,038 times