>> Why do colliding blocks compute pi? A lot of times with math I don't think the word "why" should be used. Those blocks computing pi was a good example where

>> Why do colliding blocks compute pi? A lot of times with math I don't think the word "why" should be used. Those blocks computing pi was a good example where they "proved that they compute pi", but not really why. What is the real distinction I'm trying to make here and how to explain it?