Pi is the circumference of a circle divided by the diameter. However, it is also useful in the equation πr^{2}.

Pi was discovered by Greek mathematician Archimedes Of Syracuse in the 200s BCE.

Click the pi to see the first 12 digits of pi!

**Why Pi?**

Pi is a Greek letter, similar to the Latin Alphabet's "p" as it makes the same sound. This is not to be confused with the Greek "r" eqivalent, which looks somewhat like a "p".

**What is Pi Day?**

Pi Day is celebrated on March 14th as March is the third month, which is a reference to Pi's first few digits- 3.14.

Click here to test your knowledge!