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).
(..) This was a dual engine loss at feet followed by immediate water landing. souls on board, no one ever trained for an incident like that. No one! In the TeterBoro landing, with that unrealistick back angle, we were not to find birds up there. I'd like to know how many times the pilots practiced that (..)2016 Sully