3) for angles that are very very very close (which, on the actual DAT they are) look for parallel lines. Say you have choices a), b), c), and d). Most of the time it is easy to discriminate the exremes, but for those that are tough, stay cognizant of whether of not the different choices have legs that are parallel to each other (or lie in the same plane). Say the top leg of the angle in choice a) is parallel (on the same plane) with the top leg on the angle in choice c). Ask yourself if the other legs will intersect. By mentally noting what you would have to do to make the other legs parallel to each other (or not intersect) will tell you which angle is bigger or smaller relative to the other. The leg doing the intersecting is the leg that is on the smaller angle. Say the top leg of angle b) intrcects the top leg of angle c) (b) on left and c) on right). You know that you would have to move the top leg of angle b) upward out of the point of intercection with c) to make the two legs parallel, and that you would have to move the top leg of angle c) downward. Therefore, b) is smaller than c). The test makers do things like putting legs parallel to each other to give the test-taker another path with which to solve the problem.
Hope that helps!
-Richard
