Since he did not have his notes or work with him, I created practice problems dealing with the following concepts: solving unknown parts of a right triangle using Pythagorean Theorem and SOHCAHTOA, find ratios for certain trig functions in a 30-60-90 right triangle and comparing them (sin30 = cos60, and vice versa), then I introduced another way to find the area of a triangle based on what is known.