I would get barrons DAT book specifically for the PAT section, they give you good strategies for all of the sections and if I remember it is not expensive. As for the angles, focus on the vertex of the angles, and for the obtuse angles, compare them to 90 and 180 degrees, I found that to be helpful. Also look at the answers and narrow them down, for example, most of the time, out of the four answers there will be two options for the smallest angle; figure out which is smaller and you have eliminated half of your answer choices right there.