Which measure is of an angle that is coterminal with a 135° angle?

45°

90°

495°

585°

You would do:

360 + 135 = 495

The sum means that the coterminal angle is 495

There is a formula for finding coterminal sides (the same angle or same terminal). m+360n, so whatever angle you are given, you can place that into the m variable slot. How many times you need to times 360 is where n will come in handy. 55 + 360 (5) = 1855 and 1855 is the same angle as 55. 135 + 360 (1) = 495