March 14 is the day math lovers (and most other people) celebrate pi, the measurement calculating the ratio of a circle's circumference to its diameter, the first three numbers of which are 3.14.
The number itself can go on forever. Google announced today one of its employees had calculated pi to a record 31.4 trillion digits.
» National Pi Day in Atlanta: Find out how to get free and cheap pie and pizza
» Pi Day: Woman spends months calculating 3.14 to 31.4 trillion digits for world record
Whether you love math or pie (yes, pizza pie counts), you’ll enjoy some of the best social media posts celebrating Pi Day 2019.
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