Help Itz a big test plz

For how answer my question this will be the last question can you answer in math subject

V=x^4-y^4 pick three expressions that can represent the three dimensions of the prism (each in meters)

Ethan is proving that the slope between any two points on a straight line is the same. he has already proved that triangles 1 and 2 are similar. drag statements and reasons to complete the proof.