# Happy Pi Day

March 14 (3.14) is Pi Day. As we all know, Pi (symbol: $\pi$) is a mathematical constant which is the ratio of the circumference of any circle to its diameter.  That means that if we measure the circumference of a circle and divide it with its diameter, then the quotient is always $\pi$. The constant $\pi$ is an irrational number; it starts with 3.14 and continues forever.

Pi Day was created 1988 by Larry Shaw, a physicist at the San Francisco Exploratorium.

## 6 thoughts on “Happy Pi Day”

1. If we find pi by dividing rational numbers then how has it been decided that it is irrational? thanks

2. Pingback: Pi Day: World’s most famous circles