Oh yeah - you know and love him - my favorite cult leader of all time! I was making my still-air box yesterday, and really could have used an extra set of hands to mark where to cut the slant (I use a moving box). I didn't have a marker, so I was trying to use my box cutter, and it just... wasn't cutting it.
So I said - "I know! This is a right triangle, and I know the length of one of the sides (already had made that cut) and the length of the hypotenuse (the plexiglass) - I can use the Pythagorean theorem!" And I did! And it worked great!
So for any maths haters in the crowd - YES, this stuff can be applicable!