## Elementary Geometry for College Students (7th Edition)

(a) In part a, the angle C is an interior reflex angle because the measure of the interior angle is between $180^{\circ}$ and $360^{\circ}$ (b) In part b, the angle B and the angle D are interior reflex angles because the measure of the interior angles is between $180^{\circ}$ and $360^{\circ}$