But don't blame him for the angle problem. Euclid was the one who made up the rules.
Damn.. I knew I named the wrong fella, I was just gonna say 'Ancient Greeks'! :-P
The difficulty is "proving" it, especially under the rules. Supposedly, it has been "proven" impossible.
Now, I know about the Seven Bridges of Königsberg. That's obviously impossible, and easily proven to be so, but how do you prove that the angle can't be trisected?