Question

I will draw the figures so give me a minute please..
two triangles that were constructed using a compass and straightedge. justin used the ASA prostulate to prove that triangle XYZ is congruent to triangle ABC. As part of the prove, he showed the side YZ is congruent to side BC. using this congruency, what steps would justin have likely performed to prove that the two triangles are congruent by the ASA prostulate?