The figure below represents a parallelogram A, B, C, D

The answer is: Two complements.

The figure below represents parallelogram ABCD. When the CD side extends to point E, we can conclude that the angles DAB and ADC form a linear pair. This means that the two angles add up to 180 degrees, so ∠DAB ∠ADC = 180 degrees. We can also determine that the two angles are supplementary, meaning that one is supplementary to the other. This means that one angle is 90 degrees and the other angle is 90 degrees, so ∠DAB = 90 degrees and ADC = 90 degrees. Therefore, we can conclude that when side CD is extended to point E, the two angles form a linear pair and are complementary to each other.

The figure below represents parallelogram ABCD. If the side CD is extended to point E, we can say that the two angles, ∠DAB and ADC, are congruent. This means that the two angles have the same measure. This is because when the CD side is extended, they form a straight line, and the two angles at either end of the line form a linear pair, which means they must be equal in measure. Furthermore, since they are opposites in the parallelogram, they must be congruent.

The figure below represents parallelogram ABCD. If the side CD extends to point E, we can say that the two angles, ∠DAB and ADC, are supplementary, meaning they add up to 180 degrees. This is because opposite angles in a parallelogram are always supplementary. In addition, extending sideways CD to create triangle ABC would result in two additional angles, ∠ABC and ∠BCE, which would also be supplementary (adding up to 180 degrees). This is because when two lines intersect, the alternate interior angles are always supplementary as well.