Did you know?
The use of the Greek symbol π was first used in 1706 by mathematician William Jones. There is speculation that he used “pi” as a shorthand way to represent the (what he predicted to be) irrational number. Before this, the concept was known as, “quantitas in quam cum multiflicetur diameter, proveniet circumferencia (the quantity which, when the diameter is multiplied by it, yields the circumference).”
I wonder why Pi caught on.