Without doing the entire problem for you, I'm going to give you some hints. In general, remember to start with what you are given and then proceed with the goal in mind.
You are going to solve this using the Angle-Side-Angle postulate. Segments AB and CD are the same length, since they are opposite sides of a parallelogram. You need to show that the corresponding angles are equivalent, using the definition of supplemental angles and of vertical angles.
Ready, set, go!!!
Logan K.
Thank you02/22/21