### Why is 3.14 called pi?

## Why is 3.14 called Pi Day?

It's been an official national holiday since 2009. March 14 marks Pi Day, an annual celebration of the mathematical sign pi. Founded in 1988 by physicist Larry Shaw, March 14 was selected because the numerical date (3.14) represents the first three digits of pi, and it also happens to be Albert Einstein's birthday.

## Why is pi 3.14 so important?

It's the ratio of the circumference of a circle to its diameter—a number just a little bit bigger than three. The constant π **helps us understand our universe with greater clarity**.

## Who created the number pi?

Archimedes of Syracuse

The first calculation of π was done by **Archimedes of Syracuse** (287–212 BC), one of the greatest mathematicians of the ancient world.

## How did they come up with pi?

The first rigorous approach to finding the true value of pi was based on geometrical approximations. Around 250 B.C., the Greek mathematician Archimedes drew polygons both around the outside and within the interior of circles. Measuring the perimeters of those gave upper and lower bounds of the range containing pi.

## How do you explain pi to a child?

0:153:52π – Math for Kids – What is Number Pi? – YouTubeYouTube