Answer: The domain has to be x and the range y. But for independent and dependent variable I can't help. So srry. The picture doesn't show the work. Have a nice day :)
This entry deals with the congruence of polygons in general. Congruent triangles are discussed in more depth in Congruent Triangles. Polygons are congruent if they are equal in all respects: 1. Same number of sides 2. All corresponding sides are the same length