Happy Pi Day!

Today 14^th of March 2015 or in other form 3.14.15, which is ∏ (3.1415); a day that won't repeat in a century.

 History of Pi

 Pi (∏) is a Greek letter; a symbol used in mathematics to represent a constant — the ratio of the circumference of a circle to its diameter. It's defined as the ratio of the distance around a circle (its circumference) and divided by the distance across (its diameter) which is approximately 3.1415.

It was first called "pi" in 1706 by [the Welsh mathematician] William Jones, because pi is the first letter in the Greek word perimitros, which means "perimeter", as mentioned on Nat Geo's website in an interview with Ron Hipschman.

"It's a special number. It shows up everywhere. In chemistry, physics, math, whether you're talking circles or cycles or anything to do with a curve, you're going to find pi in there somewhere. The surface area of a sphere is 4 pi "r" (for radius) squared." Hipschman added when he was asked about why the Pi deserves its own day.

Pi's Uniqueness

 What makes Pi different than other constant letters is that it goes on forever and its sequence never repeats. It was accurately calculated for the first time by the Greek mathematician and astronomer Archimedes; he got it between [3.141 and 3.143] in 250 B.C.

As years pass, people have calculated pi to greater accuracy. The Chinese got it out to six digits around the year 480 and in India, they got it out to 11 digits around 1400. But the hunt for even more decimal places really got cracking with the development of computers. Two American mathematicians calculated Pi out to 1,120 digits in 1949 using a desk calculator.

Pi Day!

Larry Shaw

This "Pi Day" celebration started 25 years ago, when Larry Shaw, a physicist at the Exploratorium, the San Francisco science museum, looked at the calendar and said, "March 14—it's the number pi [3.14, for those of you who have forgotten your grade-school math]. It's Pi Day. Let's celebrate!" So he ordered some pies for his colleagues and staff. 

Pi day wasn't officially celebrated until March 12, 2009, when the United States declared March 14 as the "National Pi Day". Nowadays, "Pi Day" is celebrated in schools, universities, and museums around the world.

Geeks around the world celebrate this day as the Pi day, but this year is different as they're celebrating the pi up to 4 decimal places not only 2; which is a date that won't come again until a next hundred years pass.

Celebration Time!

 In some schools in the US, students are gathered and have a pie breakfast together and discuss the "Pi" and discuss its importance, characteristics and its usage in all science fields.