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).
(..) on th Street! - You got it. - Angelo, get your mug over here. Wolski! You're getting some overtime! swing your jib arms over the avenue Boom angles at degrees. Spider-Man needs those big boys high and lined up. Come on, Parker. Hey. Dad! (..)2012 The Amazing Spider-Man