Pi Day Google Doodle: Here's How It Was Designed

On International Pi Day, Google creates formula using apple 'Pie'; watch how they did it

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

Google on Wednesday (March 14) dedicated its doodle to Pi, the mathematical consonant which represents the ratio between a circle's circumference and its diametre and is significantly used in geometrical calculations.

Pi Day was first celebrated by physicist Larry Shaw at the Exploratorium in San Francisco nearly 30 years ago and incidentally in 2009, the United States House of Representatives voted in favour of designating 3/14 as Pi Day. Coincidentally, this is also the birthday of the legendary theoretical physicist Albert Einstein.

Google asked Cronut inventor Dominique Ansell to create the doodle for Pi Day, which was first recognised by physicist Larry Shaw.

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According to piday.org, Pi has been calculated to over one trillion digits beyond its decimal point. Without Pi it wouldn't be possible to calculate the area of circle, A=πr².

Mathematician Archimedes used polygons with many sides to approximate circles and determined that Pi was approximately "22/7". Ansel describes the process of cooking itself as a scientific process where one has to be precise, keep in mind volume and weight in a video to celebrate the Pi day. It was however, William Jones, a mathematician from Wales, who first gave the Greek letter its current mathematical definition.

The award-winning pastry chef created the doodle using actual caramel apple pies.