30th anniversary of Pi Day celebrated with a tasty pie Google doodle

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Google shared behind-the-scene action of making the Google Doodle on Pi Day. Nowadays, Pi Day is often associated with food - perhaps pizza, or a meat pie, but in this case, a classic American apple pie with a French twist.

Today, March 14, is no typical Wednesday - it's Pi Day - and Google is celebrating the occasion with a special Doodle and pie recipe, courtesy of one of the world's most renowned pastry chefs. For the past 30 years, the holiday has been celebrated on March 14, the day of the year that lines up with the first three digits of pi. It is also used in finding the area of a circle where area = πr².

The number π is a mathematical constant. Because its most elementary definition relates to the circle, pi is found in many formulae in trigonometry and geometry, especially those concerning circles, ellipses, and spheres.

Science teacher in Idaho fed puppy to turtle in front of students
Gee said the Franklin County Sheriff's office was also investigating the teacher after receiving a complaint of animal cruelty. Look in all honesty I'm sure he was a cool guy but this is one of those things which are hard to forget, you know?

As we celebrate again in 2018, here are some Pi Day facts you should know. Therefore, it is an irrational number which is less than infinity. The rise of computing technology has led to an arms race of sorts to calculate ever more digits of pi: the current record was set a year ago by Christian physicist Peter Trueb, calculated pi to 22.4 trillion digits - 22,459,157,718,361, to be exact - outpacing the previous record set in 2013 by 9 million digits. The challenge is in its fifth year, and features mathematical problems that can be solved using Pi.

Mathematician Archimedes used polygons with many sides to approximate circles and determined that Pi was approximately "22/7".