Tutor: Congruent Triangles
Stuck on a proof? Review the essentials below, then send a demo request describing where you got stuck.
1 Quick recap before you ask
Almost every question in this skill is answered by one of these lines.
SSSThree pairs of sides marked congruent.
SASTwo sides and the INCLUDED angle.
ASATwo angles and the INCLUDED side.
AASTwo angles and a NON-included side.
HLRight triangles: hypotenuse + one leg.
The fakesSSA is ambiguous and AAA only proves similarity — neither proves congruence.
CPCTCAfter the triangles are proven congruent, CPCTC justifies each part.
CorrespondenceVertex order in △ABC ≅ △DEF tells you which parts match: A↔D, B↔E, C↔F.
2 Ask a tutor
Describe your proof and where you got stuck. A tutor will walk you through it.