From: Tom on
May I ask if someone can point me to a GEOMETRIC proof of Euler's Rotation
Theorem?

I do NOT mean the one using algebra - I really mean the one like in wiki.

The problem with the wiki one is that, well, I do not understand it. There
is a missing
symbol "O" and I do not "see" the two angle symmetry planes.

Every proof I find on the net that is NOT an alebraic one - I understand the
proof involving rotation groups - is nearly a verbatim proof of the wiki
one. So
that gets me nowhere.

(an animated proof of this one would be best... but AT LEAST a proof that
explains it a bit better.)

Thanks
t