High School · Congruence

CCSS.MATH.CONTENT.HSG.CO.B.8

Explain how the criteria for triangle congruence (ASA, SAS, and SSS) follow from the definition of congruence in terms of rigid motions.

Read this standard on the official Common Core site

Lessons that teach this standard

• Triangle Congruence: SSS, SAS, ASA and AAS

  Why three matching parts are enough to prove two triangles congruent, how each criterion follows from rigid motions, why SSA and AAA fail, and how CPCTC finishes a proof.