Common Core · High school
HSG-CO.B.7
High school — Use the definition of congruence in terms of rigid motions to show that two triangles are congruent if and only if corresponding pairs of sides and angles are congruent.
The skill that covers it
What a student should be able to do
- Match corresponding sides and angles of congruent triangles from a congruence statement.
- Choose the criterion (SSS, SAS, ASA, AAS or HL) that proves two triangles congruent, or decide there is not enough information.
- Use CPCTC to find an unknown side or angle once triangles are congruent.
- Supply the missing statement or reason in a two-column congruence proof.