Pi is the ratio of a circle’s circumference to its diameter. The video discusses an approximation used in ancient Babylon around four thousand years ago and later developments in calculating the value. This history is best understood as evidence of early approximations across cultures, not as the single discovery of pi by one person or civilization.
Archimedes and bounding the value
Archimedes used polygons drawn inside and outside a circle to narrow the range in which pi must lie. His method shows why 22/7 is an approximation, not an exact value. NASA’s historical overview of pi summarizes early mathematical evidence and Archimedes’ approach.
The history of pi developed over many periods and in multiple cultures; it was not a simple progression from one value to another.