Published: Wed, March 14, 2018
Hi-Tech | By Ellis Neal

Google celebrates 30th Pi Day with a doodle of actual pies

Google celebrates 30th Pi Day with a doodle of actual pies

Today, Google homepages across the world are featuring something delectable and irrational at the same time.

March 14, 2018, is Pi Day - that's pi, not pie - and on Wednesday, Google marks the 30th anniversary of the math-inspired holiday with a special Doodle. 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. The Doodle represents Pi's mathematical formula-the ratio between a circle's circumference to its diameter-in pie form. Other than matching the first three digits of the value, it also happens to be Albert Einstein's birthday. It is also used in finding the area of a circle where area = πr².

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. To celebrate the once-a-year occasion, Google is treating users with a look at a salted caramel apple pie recipe by baker Dominique Ansel, aka the inventor of the cronut.

The day is observed by the scientific community in the West with a slice of sweet pie. The result comes out to be 3.14 which can extend to quite a few decimal places as mathematicians say that the divisibility continues to trillions. It was however, William Jones, a mathematician from Wales, who first gave the Greek letter its current mathematical definition.

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