Triangles

Virginia SOL G.TR.3

Prove and justify triangle similarity and solve related problems.

What students need to be able to do

  • Use definitions, postulates, and theorems (SAS, SSS, AA) to prove and justify that triangles are similar.
  • Use algebraic methods to prove that triangles are similar.
  • Use coordinate methods, such as the slope formula and the distance formula, to prove two triangles are similar.
  • Describe a sequence of transformations that can be used to verify similarity of triangles located in the same plane.
  • Solve problems, including those in context, involving attributes of similar triangles.