Question

lesson 4: angles and lines
types of angles
which of the following defines a pair of supplementary angles?
a. the sum of the angles is 360°
b. the sum of the angles is 90°
c. the sum of the angles is 270°
d. the sum of the angles is 180°
check answer

Explanation:

By definition, supplementary angles are two - angles whose sum is 180 degrees.

Answer:

d. The sum of the angles is 180°