You can put this solution on YOUR website! The only way to answer this is if I can see the diagram. Consecutive angles in a parallelogram are supplementary and opposite angles are congruent. Email me at justin.sheppard.tech@hotmail.com with the image OR we can arrange to meet on an online whiteboard (for free) and I will help you with this problem.
Justin
justin.sheppard.tech@hotmail.com