Monday, June 20, 2016

Best Inventions so far ... ( Some thing that all engineers should always rever)

how it was done before and approx times----

The values of Pi through time



Person/PeopleYearValue
Babylonians~2000 B.C.3 1/8
Egyptians~2000 B.C.(16/9)^2= 3.1605
Chinese~1200 B.C.3
Old Testament~550 B.C.3
Archimedes~300 B.C.proves 3 10/71uses 211875/67441=3.14163
Ptolemy~200 A.D.377/120=3.14166...
Chung Huing~300 A.D.sqrt(10)=3.16...
Wang Fau263 A.D.157/50=3.14
Tsu Chung-Chi~500 A.D.proves 3.1415926
Aryabhatta~5003.1416
Brahmagupta~600sqrt(10)
Fibonacci12203.141818
Ludolph van Ceulen1596Calculates Pi to 35 decimal places
Machin1706100 decimal places
Lambert1766Proves Pi is irrational
Richter1855500 decimal places
Lindeman1882Proves Pi is transcendental
Ferguson1947808 decimal places
Pegasus Computer19577,840 decimal places
IBM 70901961100,000 decimal places
CDC 66001967500,000 decimal places

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