Math1316 - Trigonometry & Math2412 - Precalculus / "Precalculus" 11/e, Sullivan, Pearson. 1:00 - Find the area of a triangle given 2 sides and 1 angle. (SAS) 3:58 - Find the area of a triangle given all 3 sides. (SSS) - Heron's Formula! 7:52 - Solve an application problem involving finding the area of a triangle. (SSS)