If angle ABC = angle XYZ what is the mesure of A? Let c= 12, z=18, and x=27
I am afraid you need to give more information for a meaningful answer. Are you talking about two similar triangles, ABC and XYZ, where the side c=12, z=18 and x=27? Something like this?!
Only problem is that also this triangle fulfills the given measures:
You, therefore, need more information to be able to get to a definite answer.