It was discovered that pi was actually used in building the pyrimads of Giza around 2600-2500BC. The perimter of the pyrimads were 1760 cubits and the height of the pyrimad was 280 cubits. This is a ratio of 2pi. 1760:280 = 2pi.
This is the first recognition of pi.
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The Egyptians and the Babylonians are the first cultures that discovered Pi about 4,000 years ago.
The babylonians first discovered the ratio compared to the diameter and circumference of a circle. Later, Archimedes(287-212BC) discovered and proved his theory of pi. Pi to 27 decimal places: 3.141592653589793238462643383 The square root of pi (to 30 decimal places) is: 1.772453850905516027298167483314
The Egyptians calculated the area of a circle by a formula that gave a aproximate value of 3.1605
mathalets from the 3rd century in 130 ad from babylonian discovered that pi equals 3.14567789870989977890.....
Pi was discovered ny the ancient Greeks around 1900 B.C