Archimedes first used the symbol PI because he was the first one to discover it so he wanted to investigate about it.
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i think Archimedes was the first to discover pi (3.14) or leonhard euler by brichelle xD
Archimedes
Archimedes made pi more precise
Archimedes (287-212 BC) was the first to have had a serious attempt at calculating pi.
The first person to calculate pi was Archimedes, around 250 B.C. Using the formula:A = pi r^2