6. What else must you know to prove the triangles congruent by SAS?
b) ACD=CAB ; AD=BC
*You can also use reflexive property for segment AC*
For ASA we have one side common and one angle given equal so we need one more angle which includes that side.
For SAS we already have 1 side and 1 angle..what we need is one more side including that angle!
So, the answer is B. ACD=CAB ; AD=BC