# International Day of Pi 3-14-15

Today (3-14) is celebrated around the world by Pi Day enthusiasts. This year (2015) offers several bonuses making it a very special day – a once in a lifetime date for math nerds and dessert lovers everywhere. Let me explain a little about Pi so you can be excited and celebrate too.

3.14159265358979323846…..

By definition, Pi is the ratio of the circumference (the length around) of a circle to its diameter (the length across the middle). Pi is always the same number, no matter which circle you use to compute it.

When written, Pi is an infinite decimal. This means that it has infinitely many numbers to the right of the decimal point, and the numbers never repeat in a pattern.

As a number that cannot be written as a repeating decimal or a finite decimal, Pi is irrational meaning it cannot be written as a fraction (the ratio of two integers).

The Greek symbol “π” pronounced “pie” was chosen as the letter to represent the number because it stands for ‘perimeter’ and is used to represent a constant.

Now that you know a little more, this year’s Pi can be celebrated to 10 digits – the day, the year, the hour, the minute, and the second: 3-14-15 9:26:53 (once in the morning and again in the evening)

Here are some resources to learn more about Pi Day and to find a way to mark this once in a lifetime experience:

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• "Amazing program that has truly changed my life. Once I was accepted it was such an easy process. Thank you so much!! I would recommend any one with low income and bad teeth to go through the process."

- Alexandria W.

• "Just had our last appointment. Being a school teacher I didn't make a lot of money. This program allowed me to give my daughter a smile that she shares with everyone. Thanks."

- Tiffany L.

• "I just had not one but two daughters finish having their braces on through Smiles Change Lives and we are so happy with the results. Thank you for providing this service!"

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• "This is an incredible organization with Orthodontists donating their skills to change children's lives. More people in need should know about this fantastic program"

- Judith W.

• "My son has finally been accepted, approved, and assigned an orthodontist. He goes tomorrow for his first appointment to start getting his braces. Thanks SCL, you have made my son very happy."

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• "I am so thankful for smiles change lives for helping a struggling mother out. What an amazing program that helps families."

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• "I cannot say enough GREAT things about this program! They have given both of my daughters a new outlook on life, & self confidence that I could never teach."

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