the Egyptians
Parentheses
The ancient Babylonians from around 1700 BC used pi = 3.125. The name of the person who calculated that value was not recorded.
The first proof of the irrationality of Pi was done by J.H. Lambert in 1768
3.141592654 rounded by the calculator
pi is currently at 4 million digits
You take the circumference of a circle and divide it by the diameter.
While there is no fraction form for pi, 22/7 is an approximation of pi that can be used for a rough calculation .
The most accurate calculation of pi is currently estimated to be around 31.4 trillion decimal places. This calculation was achieved using supercomputers and advanced mathematical algorithms. However, for most practical purposes, using pi to just a few decimal places (3.14159) is sufficient.
Archimedes
The most accurate calculation of pi currently is 62.8 trillion digits, achieved by Timothy Mullican in January 2022 using the y-cruncher software. It took over 108 days to complete the calculation.
The circumference of a circle when divided by its diameter is the value of pi which is an irrational number that can't be expressed as an exact fraction.