That's pretty funny. Like the author said, it may not be true, but it's a fun piece of analysis.<p>I can almost remember doing math like this at school.
Thanks for kind comments. Yes, it was meant as a little light hearted fun. I've been writing a series of articles about solids inscribed inside others, and this seemed a (stretched) way of giving the article a different spin.
Actually Δ ADE is not a right triangle. (Unless A is infinitely far away from D and E.)<p>Edit: thanks TheLoneWolfling, I was looking at the wrong angle.