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).
(..) MAN: Yes! - That was the girliest throw in the world. You know, you're very much in the hands, in those scenes, of the filmmakers who... ...with the particular angle of the camera, will make it look more dangerous... ...than it actually is. SERKIS: And when you're directing (..)2012 The Hobbit: An Unexpected Journey