Pi is the circumference of a circle divided by the diameter. However, it is also useful in the equation πr2.

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.

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