Equiangular lines are an elemental part of geometry. Mathematicians have discovered a tighter limit on the number of such lines that exist in every dimension. Imagine a set of many lines as in a dream ...
Hmm pizza! Oh sorry, focus! So I think today, we are looking at angles. Great! You’re cutting that pizza at right angle. That means the angle is 90 degrees. Nice big piece for square. So what next?