Which statement regarding the interior and exterior angles of a triangle is true? An exterior angle is supplementary to the adja
cent interior angle. An adjacent interior angle is supplementary to a remote interior angle. A remote interior angle is congruent to the exterior angle. An exterior angle is supplementary to the remote interior angle.
An exterior angle is supplementary to the adjacent interior angle.
Explanation:
An exterior angle of a triangle and its adjacent interior angle form a linear pair. This means they form a straight line, and a straight line has a measure of 180°. Since they combine for a total of 180°, this means they are supplementary.
