Archimedes
The first time the symbol Pi was first used for Pi was in ancient Greece in their numbers. The symbol "π" was number 80 in Greece.
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
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.
First of all to correct your English Grammar. 'Pie' is the foodstuff that you eat. e.g. Apple Pie or Meat pie. The Mathematical symbol is 'pi' NO letter 'e'!!!! It is the modern spelling of the small case Classical Greek letter 'p'.