Pi, the circle constant in mathematics, is in trouble, , Pi is the “irrational” infinite number you get when you divide the circumference of a circle by its diameter. It starts 3.14159265, it fits into all kinds of equations and it turns up in strange places such as the fractal geometry of the Mandelbrot Set.
Tau is the number you get when you use a circle’s radius instead. It fits neatly into equations in place of 2Pi and clears up the problem of radians, which is the way mathematicians measure angles.
According to U.S. physicist, educator, and entrepreneur Dr Michael Hartl, author of The Tau Manifesto, Pi is a “confusing and unnatural choice” for the circle constant. “I find it fascinating that the absurdity of Pi was lying in plain sight for centuries before anyone seemed to notice,”
“Pi simply isn’t the most natural number that we should associate with a circle. The proper number is 2Pi, or Tau.”
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