PLEASE I NEED HELPPP Here is the answer to the question before so you have contexts.

Question: Part D
Change the orientation of the transversals, and calculate the ratios again. Based on the new ratios, what can you conclude about three or more parallel lines that intersect two transversals?
No matter where I move the points to change the transversals, the ratio stays the same. This means that when three or more parallel lines intersect two transversals, the ratios of the lengths of these transversals will always be 1:1.

Here is the question I need help with:
Part E
State your conclusion in the form of a theorem, and then prove the theorem using a two-column proof. When you write the proof, refer to the diagram you created in part A. It will be helpful to use point labels to state what is given and what you have to prove and to use those labels throughout the proof.

As part of the proof, you’ll have to construct a line segment connecting the top intersection point on one of the transversals with the lowest intersection point of the other transversal, thus forming two triangles. Take a screenshot of the construction, save it, and insert the image in the space below before you begin your written proof.

Please help, I'm so confused.