Answer:
90 degrees is a right angle, and is in the corner of this text box, or this: |_
40 degrees is an acute angle, a little less than half 90 degrees, like this: <
135 degrees is an obtuse angle, and is 90 degrees + 45 degrees.
Also, something important to remember when drawing this is that 180 degrees is half of a circle, and 360 degrees is a full circle.