Triangle Trigonometry

Virginia SOL T.TT.2

Find areas and solve for sides/angles in non-right triangles using the Law of Sines and Law of Cosines.

What students need to be able to do

  • Apply the Law of Sines to find missing sides and angles in non-right triangles.
  • Apply the Law of Cosines to find missing sides and angles in non-right triangles.
  • Recognize the ambiguous case when applying the Law of Sines and determine potential two-solution scenarios.
  • Calculate the area of any triangle using the formula Area = 1/2absinC, where a and b are sides and C is the included angle.
  • Solve contextual problems involving non-right triangles using the Law of Sines, Law of Cosines, and area formula.