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SCIENCEALERT STAFF Pi (π) is a constant describing the ratio between a circle s circumference and its diameter. It is an irrational number usually summarized to two decimal places as 3.14. The Greek letter for P was chosen by the 18th century Welsh mathematics teacher William Jones, most likely to stand for periphery .
Symbolically, the term pi was chosen to stand for something more than a mere number. Prior to its use in the early 18th century, the quantity was represented by terms and fractions, none of which adequately reflected an incomprehensible, infinitely long sequence of non-repeating decimals. Jones might have suspected that the exact proportion between the diameter and the circumference can never be expressed in numbers , but it wasn t until the 1760s that the Swiss polymath Johann Lambert came up with a proof of its irrationality. ....
A moon pi. Okay, I ll stop. Let s talk about Pi Day. What are your plans? The value of pi (pronounced pie ) was first accurately approximated by one of the greatest mathematicians, Archimedes of Syracuse (yes, the guy in your Physics book who jumped out of the bathing tub and ran down the streets naked screaming Eureka! ). The constant has been studied by humans for over 4000 years with the Babylonians and the ancient Egyptians being one of the earliest to do so. It was later in 1706 when William Jones baptized the value as the 16th Greek letter, π. However, Pi Day would not have ended up as part of pop culture if it weren t for physicist Lawrence N Shaw (a.k.a Prince of π). In 1988, Shaw noticed the link between March 14 and the first 3 digits of pi while working at Exploratorium, a museum of science, technology, and arts museum in San Francisco. Cue: the date format is 3/14 (mm/dd). A year later, the museum announced the day as a holiday and since then the celebratio ....