I have to figure out the measure of the two different angles from the picture. If somebody could show me how to solve this type of problem then that would be great.

This was the question and there are a few others like it.

They say that you are supposed to measure the angles in degrees, minutes, and seconds. This ' stands for seconds, this " stands for minutes, and the degree symbol most people know already.

My work as follows:

60/20, 60/15, 3600/40 and 60/10, 60/12, 3600/30

I then got the answers 3, 4, 90, and 6, 5, 120

However I am not really sure what to do with these numbers or if I even figuring this out correctly.