Liner equation with a rapid change over time

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

Given: hf || jk; hg ? jg prove: fhg ? kjg to prove that the triangles are congruent by asa, which statement and reason could be used as part of the proof? fgh ? kgj because vertical angles are congruent. jkg ? hfg because vertical angles are congruent. fhg ? jkg because right angles are congruent. hfg ? kjg because alternate interior angles are congruent.

Wich statement could be used to explain why the function h(x)= x^3 has an inverse relation that is also a function