Who proposed the use of Tau as the circle constant, instead of Pi
Tau was proposed as a better circle constant than Pi by Michael Hartl in The Tau Manifesto, published on June 28, 2010.  Hartl's idea for Tau was inspired by Bob Palais, who had earlier published an article questioning whether Pi was the best constant to use.
Quem propôs o uso de Tau como a constante do círculo, em vez de Pi
O Tau foi proposto como uma constante de círculo melhor do que o Pi por Michael Hartl no The Tau Manifesto, publicado em 28 de junho de 2010.