I distinctly remember when I was learning geometry that there were some things that never really made sense. Why was pi defined in terms of the diameter when li

I distinctly remember when I was learning geometry that there were some things that never really made sense. Why was pi defined in terms of the diameter when literally everything else we learned about circles used the radius? Why did radian angles feel off by a factor of 2? When I later stumbled upon the Tau Manifesto, it felt like a lot of things fell into place. And by that time, I had also studied calculus and had a familiarity with the kinds of things that happen in formulas which relate lengths and areas, so the discussion of the circle area formula resonated as well. Despite all the cheap dismissals one sees, this feeling of "woah, that would have actually made sense!" is a big part of what makes the Tau Manifesto popular.