I know there are many types of squares, and ultimately all of them are used check an angle for square-ness, i.e., to make sure it is a 90° angle. But different squares are good at different jobs. For example, a Swanson speed square has a lip on one side that makes it really good for quickly drawing a perpendicular line on a work piece (among many other things).
What does a try square excel at? If my understanding is correct, a try square has one arm that is thinner than the other arm, like this one:
Most sources from around the web just say that "try square" is another name for "square", and describe what a square does. But I'm thinking there must be something that a square with one arm thinner than the other is better at than, say, a Swanson square or a framing square.