The symbol for pi has been regularly used for the past 250 years only.
You can never find the true circumference or area of a circle because we can never find the true value of pi.
Pi day is celebrated on March 14 every year. It represents 3.14, which is pi value. The first widely-attended pi day celebration was organized by Physicist Larry Shaw, also known as Prince of Pi, in the year 1988.
Computing the value of Pi is a Stress test for a computer.
Humans studied Pi for almost 4000 years.
Pi is mentioned in bible (I Kings 7:23-26 Mentions the approximate numbers of Pi)
“Ludolph’s Number”, “Archimedes constant”, “Circular constant” are names by which Pi is referred.
Sources: 1.)"Pi in the Bible?" Pi in the Bible? N.p., n.d. Web. 27 Feb. 2017.
2.)Sunkara, Naga Rao. "30 Amazing Facts about Pi." Spinfold. N.p., 27 July 2014. Web. 27 Feb. 2017