Here is the awnser I was looking for:

-the 16th letter of the Greek alphabet

this is what Wikipedia says, The constant is named "π" because it is the first letter of the Greek words περιφέρεια 'periphery'[1] and περίμετρος 'perimeter', i.e. 'circumference'.
FreeVenice Reviewed by FreeVenice on . HAPPY PI DAY! Haha its Pi Day... I didnt know till I got to school but it was basically a free day for us... And if you dont know... The math equation pi, is equal to 3.14... and today is march 14... aka 3.14 lol HAPPY PI DAY Rating: 5