Respuesta :
Answer: (First answer choice) angle A and angle B are supplementary
One rule in any parallelogram is that the adjacent angles (ie angles that are next to each other) add to 180 degrees. So that is why the adjacent angles A and B are supplementary.
Another rule is that the opposite angles of a parallelogram are congruent.
Answer:
A). ∠A and ∠B are supplementary.
Step-by-step explanation: