# Chapter 12 - Section 12.1 - Angles and Polygons - Exercise - Page 388: 26

$$y=108^o$$

#### Work Step by Step

Since $y$ and $108^o$ are alternate-interior angles, then they are equal. That is $$y=108^o$$

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.