Chapter 9, Lesson 4

9-4.A use the relationship for supplementary angles
If the measure of angle x = 27°, what is the measure of the supplement of angle x?

9-4.B use the relationship for vertical angles
Find the measures of angles a, b, and c.

9-4.C recognize adjacent angles
In each figure, tell whether angle 1 and angle 2 are adjacent angles. If the angles are not adjacent, tell why not.