Pi has been perhaps the most famous constant. Used to find the radius of a circle, it is used a lot. However, not many people know of tau, or τ. It is the nineteenth letter of the Greek alphabet. It represent twice the value of pi.
It would equal roughly 6.283
Some people argue that pi should not have been famous and tau should have taken its place.
There is even a Scientific American article written how tau is better than pi.
https://www.scientificamerican.com/article/let-s-use-tau-it-s-easier-than-pi/
Can you imagine celebrating tau day (July 38) instead of pi day? (March 14)
It is puzzling to think what our world would be like if pi was replaced by tau.
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