You can thank the Greeks and their obsession with Geometry for this one. They found when you divided the circumference of a circle by its area I think you get 3.141...... or pi. Actually the ratio Pi is obtained by dividing the circumference of any circle by the length of the diameter. There is also some evidence which possibly indicates that this ratio (Pi) was known to the ancient Egyptians ca 2500 b.c.e.
dont worry about it
It is not known exactly who first discovered Pi. It has been used for over 4,000 years and dates back to the times of ancient Egyptians.
aryabhatta discovered it as 3.1416
The Egyptians and the Babylonians are the first cultures that discovered Pi about 4,000 years ago.
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.
The Egyptians calculated the area of a circle by a formula that gave a aproximate value of 3.1605
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
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
The Egyptians
In the 168,983 place for the first occurrence.
None. The first zero in 'pi' occurs in the 32nd decimal place.