## 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.**