a salesman who's always looking for an 'angle' [=looking for a way to convince people to buy the things he is selling]
The two lines meet at a 30-degree 'angle' to each other. = There is a 30-degree 'angle' between the two lines.
The two lines form a sharp 'angle'. = The two lines meet/intersect at a sharp 'angle' (to each other).
(..) Mo, Sol or Lem is not gonna get away with this. -I'll be right back. -Okay. Hey, George. Is it just the angle I'm looking from? -No, sir. We are down there. -Oh, this is amazing. Oh, I never felt so alive. All right, I'm satisfied. We better get some gas. (..)1998 TvShow: Seinfeld Title: The Dealership Season: 9 Episode 11