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建立人际资源圈Origin_Of_Pi
2013-11-13 来源: 类别: 更多范文
Origin Of Pi
The Greek letter * (pi) is used internationally to represent the number that is the ratio of the circumference of a circle to its diameter or the ratio of the area of a circle to the square of its radius. Pi is an irrational number, which means that pi is a number that cannot be expressed in a simple fraction or as a decimal with a set number of decimal places. Pi is also a transcendental number, that is, pi is a number that is not expressible as the root or quotient of integers and pi is a non-repeating infinite decimal. The origin of pi is hard to measure since pi, as a constant has been known for so long. The earliest recorded incidents of pi came from early Babylonian and Egypt, where most mathematics originated.
The first known record of pi comes from the Rhind Papyrus (1650 B.C.), where the
Egyptians calculated pi to be equal to 4(8/9)2 or 3.1605 , which is very close to the value used today. The value that the Egyptians used is believed to date around 2000 B.C.
The next reference to a calculation of pi is by the Babylonians. The Babylonians are thought
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