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).
(..) - Itu buruk sekali, kau tahu itu.. - Tidak. You right, you look like a fuck. But no, we will taking to like some institution or somewhere that have angle, you know. rise the kid or whatever. You know what? If you happy, God bless you, buddy. No, I not fucking happy, no one (..)2013 The Wolf of Wall Street