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Pi is an extremely interesting number because it can never be written down exactly, although it can be written to any number of decimal places. In elementary mathematics we often take three and one seventh (or 22/7) to be a

reasonable value to work with, or we can use the decimal number 3.142, but neither is the correct value of Pi. Yet it is need in calculations in so very many aspects of science and maths. Without a knowledge of Pi the astronauts would not succeed, neither would engineers, whether for aircraft, engines, or dynamos and electrically driven cars. And yet it is simply the number of times that the diameter of any circle would wrap exactly around its circumference.

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13y ago

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