Question

1. two non-common sides of adjacent supplementary angles form a ______ angle.

obtuse
reflex
straight
acute

Explanation:

Adjacent supplementary angles are two angles that share a common side and their non - common sides form a straight line. Supplementary angles add up to \(180^{\circ}\), and a straight angle is also \(180^{\circ}\). Obtuse angles are greater than \(90^{\circ}\) but less than \(180^{\circ}\), reflex angles are greater than \(180^{\circ}\) but less than \(360^{\circ}\), and acute angles are less than \(90^{\circ}\). So the two non - common sides of adjacent supplementary angles form a straight angle.

Answer:

C. straight