2 and 3 are very important in all this........................and are the 1st two primes........and the only instance........EVER where two primes are but a digit apart........

Pi - Math is Fun

https://www.mathsisfun.com/numbers/pi.html

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Draw a circle with a diameter (all the way across the circle) of 1. Then the circumference (all the way around the circle) is 3.14159265... a number known as Pi.

Pi - Wikipedia

https://en.wikipedia.org/wiki/Pi

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Jump to Role and characterizations in mathematics - The earliest known use of the Greek letter π to represent the ratio of a circle's circumference to its diameter was by Welsh mathematician William Jones in his 1706 work Synopsis Palmariorum Matheseos; or, a New Introduction to the Mathematics.

‎Letter · ‎Pi (disambiguation) · ‎Squaring the circle · ‎Mathematical constant

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