Google Doodle: What is Pi day?

Google Doodle: What is Pi day?

Google Doodle: What is Pi day?

In today's doodle, an image of ingredients used to bake a salted caramel apple "pie" - Google puns on the word - hints at the tradition of eating pies on this day.

Historically, the first Pi Day was held at a San Francisco Science Museum in 1988 when the physicist looked at the calendar and made a decision to pay homage to the mathematical entity. The day is celebrated every year on March 14th (3.14).

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Google teamed up with Dominique Ansel, creator of the cronut, to create the Google doodle celebrating the 30th anniversary of Pi Day, on March 14. Google states that this year is the 30th year of celebrating Pi day, as it was first recognised by physicist Larry Shaw in 1988. And, those wishing to mark to the occasion often do so by enjoying a slice of their favourite pie. Though modern mathematicians have calculated more than one TRILLION decimal places beyond the standard "3.14", pi is an irrational number that continues on to infinity!

In math, pi (π) represents the mathematical ratio of a circle's circumference to its diameter. 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. The challenge is in its fifth year, and features mathematical problems that can be solved using Pi.

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But adding new digits is little more than a pastime for mathematics fanatics: NASA's Jet Propulsion lab only uses 15 digits to calculate interplanetary travel, while mathematician James Grime argues that just 39 digits of pi is enough to calculate the circumference of the known universe.

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