The Greeks did starting around 730 BC.
the first person to use pi was the amazing thomas paul pearson
It was popularized by Leonhard Euler, when he adopted the symbol in 1737. By this time, Euler was already a fairly prominent mathematician, serving as head of the mathematics department at the Academy at St. Petersburg. As far as modern historians know, the symbol was first used for that purpose in print in 1706, by Welsh mathematician called William Jones. Prior to that, the symbol for pi was used for the circumference of a circle, not for the (constant) ratio of that circumference to the circle's diameter.
A capital A is usually used as a symbol for area in math.
---- The symbol for pi was used by the early English mathematicians William Oughtred (1574 -1660), Isaac Barrow (1630-1677), and David Gregory (1661-1701) to designate the circumference , or periphery, of a circle. The first to use the symbol for the ratio of the circumference to the diameter was the English writer, William Jones, in a publication in 1706. The symbol was not generally used in this sense, however, until Euler (1707-1783) adopted it in 1737. (Eves p99) By Douglas Weaver Mathematics Coordinator, Taperoo High School with the assistance of Anthony D. Smith Computing Studies teacher, Taperoo High School. ----
Pythagoras was the 1st person who used the pi symbol first
William Jones first used the pi symbol (π) in 1706
Archimedes first used the symbol PI because he was the first one to discover it so he wanted to investigate about it.
William Jones, a Welsh mathematician, first used the pi symbol in 1706.
Archimedes
Archimedes
The pi symbol was introduced in 1706 by William Jones. The usage of the symbol was popularized by Leonhard Euler. He adopted it in 1737.
Albert Einstine
Archimedes first used the symbol PI because he was the first one to discover it so he wanted to investigate about it.
William Jones in 1706
Any mathematician will use the number pi (and its symbol) sooner or later - it is a number used extensively in many different areas of mathematics.
It was a cool looking greek letter.