Yesterday, during my Pre-Algebra class, which I just happened to be in during the 9:00 hour (more on that later), we celebrated Pi Day. We brought sweet treats to share with the whole class. The only catch is that whatever we brought had to be round, like a pie. Pi Day is celebrated on March 14th (3/14) each year. But, since March 14th is on a Saturday this year, we celebrated yesterday. Pi (Greek letter “π”) is the symbol used in mathematics to represent a constant — the ratio of the circumference of a circle to its diameter — which is approximately 3.14159. Pi has been calculated to over one trillion digits beyond its decimal point. Pi is an irrational and transcendental number, meaning it will continue infinitely without repetition or pattern. Pi only uses a few digits when normally used in calculations; but the fact that it is infinite means that you can memorize it out to as many places past the decimal point as you like and continue to calculate more and more digits because you’ll never run out. Yesterday we played Pi games and had a lot of fun! Yes, a lot of fun calculating Pi in math class. I know, right! But, what makes Pi Day this year so interesting is this: Pi is 3.14159265358 and on and on and on. But, if you look closely, 3.1415 means **March 14**, 20**15**. And furthermore, I was in math class at 9:26 a.m. yesterday, so that’s when we started our Pi celebration! Neat, huh? That only happens once every one hundred years! I had such a good time at our Pi Day celebration on yesterday that it even made me forget how superstitious I am and yesterday being Friday the 13th didn’t even matter to me!

Learn more about Pi Day at these sites:

PIDay.org

NBC News Science

**Happy Pi Day!**

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