Identify the theorem you can use to show that the quadrilateral is a parallelogram.
100
100
Parallelogram Diagonals Converse
Parallelogram Opposite Angles Converse
Parallelogram Opposite Sides Converse
Opposite Sides Parallel and Congruent Theorem

c

step-by-step explanation:

step-by-step explanation:

at each of the parallel lines adjacent angles are supplementary. the angles have special names identifying their positions with respect to the parallel lines and transversal. they are corresponding angles, alternate interior angles, or alternate exterior angles. an angles is congruent to its matched angle.