## Celebrating the joys of math can be as easy as pie.

Today is Pi Day, a day to celebrate the joys of the mathematical constant of 3.14159 or a slice of baked deliciousness.

If the term "pi" doesn't ring any bells, let's review a little high school geometry. Pi is the ratio of a circle's circumference to its diameter and is represented by the 16th letter of the Greek alphabet ("π") and is often written simply as "pi."

According to PiDay.org (yes, this website actually exists), the number's "infinite nature makes it a fun challenge to memorize, and to computationally calculate more and more digits."

So why celebrate pi on Thursday? Because it is March 14 (3/14).

**Here are five ways to get the math party started:**

**(1) **To eat or not to eat pie is not a question on Pi Day. Bake or buy a whole pie (here's one scrumptious recipe). You can calculate the circumference of the pie by measuring the diameter and then by multiplying it by pi, or simply satisfy your sweet tooth with several bites. Share the rest and you can count the number of co-workers who will love you.

**(2) **Wow your friends with a few strange facts about Albert Einstein. Why? The German-born physicist shares his birthday with the first three digits of pi. Here's one strange fact: Not only did Einstein develop the general theory of relativity, but his second wife was his cousin. You can also get to know the genius better by exploring the interactive Einstein Brain Atlas app.

** (3) **Send infinite wishes to your loves ones with a pi e-card! 123greetings.com has some fun ones, including a pi rap card.

**(4)** Calculate how much you can save with Pi Day deals, like this one at the Microsoft store, which is offering 3.14% off a Dell tablet.

**(5) **Relax with pi. Watch a good pi movie or read a good pi book. Yann Martel's *Life of Pi* is a transformative novel about Piscine Molitor "Pi" Patel, a boy, who survives after being stranded on a boat with a Bengal tiger for 227 days. The book was adapted into a 2012 Oscar-nominated movie directed by Ang Lee.

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