Answer:
The exterior angle, D, is supplementary to the adjacent interior angle, C. Together, they form a straight line, measuring 180°. The measure of the remote interior angles, A and B are equal to the measure of the exterior angle D.
Step-by-step explanation:
Exterior angle D is supplementary to adjacent interior angle C.
Measure of angle C + measure of angle D = 180 degrees
Angle A and Angle B are remote interior angles to exterior angle D.
