# Thread: Stuck on 2 column proofs for congruency of triangles

1. ## Stuck on 2 column proofs for congruency of triangles

Ive gotten this done so far, but i'm pretty sure its wrong. Really frustrated with this. Anyone help?

 Rectangle ABCD given ab=dc opposite sides ad=bc opposite sides bd=bd

2. ## Re: Stuck on 2 column proofs for congruency of triangles

both "proves" are written incorrectly; they should be written (a) Prove: $\Delta ABD \cong \Delta CDB$ and (b) Prove: $\Delta ABC \cong \Delta CDA$

note diagonals DB and AC equal themselves by the reflexive property of equality ... so you will have SSS for both proofs, correct?