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).
(..) Hello, Miss Lane, how are-- How are you doing? Jimmy Olsen, photographer. Hi. Clark Kent. Nice to meet you. It's got everything: sex, violence, the ethnic angle. So does a lady wrestler with a foreign accent. -Kent, can you open this? -Sure, Mr. White. This could be the basis (..)1978 Superman