Archimedes, by measuring inscribed polygons (insided a circle) and circumscribed polygons (around a circle) pinned the value of pi between 3 1/7 and 3 10/71.
3 1/7 = 3/142857 ...
pi = 3.1415926535...
3 10/71 = 3/14084507 ...
Many, many centuries later, pi because identified with infinite series, so now pi is calculated with computers.
Archimedes, by measuring inscribed polygons (insided a circle) and circumscribed polygons (around a circle) pinned the value of pi between 3 1/7 and 3 10/71.
3 1/7 = 3/142857 ...
pi = 3.1415926535...
3 10/71 = 3/14084507 ...
Many, many centuries later, pi because identified with infinite series, so now pi is calculated with computers.