Question

@Directrix proof 5

Answer 1

Here's a triangle symbol you can copy and paste:

△ ABC

Answer 2

Proof #5

Answer 3

The first step is to mark up the diagram with the given information.
This gives, I hope, an idea on how to do the proof.

Here is what we have so far.

Answer 4

We have one pair of angles and one pair of sides congruent.

We need another pair of angles and can get them from the parallel segments.

Answer 5

where will the parallel segments be at?

Answer 6

Look at the given of the proof: Segment AB || Segment CD.

Answer 7

Why are angles A and C congruent? The answer has to do with parallel lines cut by a transversal and a certain kind of angles being congruent.