What else must you know to prove the triangles are congruent by sas?

Those have the same lengths or measures. Then. We can deduce that these two triangles must be congruent. By the rigid motion definition of congruence. Or the shorthand is if we have side-angle-side

Explanation:

Hope i helped :))

so whats the answer

if you know your abc's you should be able to get your answer or just use google