I would not recommend that idea, do you really want to end up with a voided DAT score just to get a few more angle problems?
Try this, look at the arc length of the two angles, but make sure to be the same length from the apex. If you are stuck, look away and look again, make a decision and move on. Then later if you have time go back and spend more time on the marked questions.
For angles that are close to 90degrees mentally draw a perpendicular line and compare the two angles which one is closer to that line. For very large angles, mentally draw a continuation of one of the lines so it makes a 180 and then compare the two angles.
Instead of figuring out ways to cheat, try practicing!
Or you might as well try using a protractor instead of the lens!