The questions: prove that opposite angles of a parallelogram are congruent. be sure to create and name the appropriate geometric figure.

Opposite angles of a parallelogram are congruent.
First of all, we that a quadrilateral is a parallelogram if and only if the opposite angles are congruent. 
Also, we know that alternative interior angles are congruent.
These two can help us prove that that opposite angles of a parallelogram are congruent given a quadrilateral parallelogram.

It should be amark me brainliest