### Home > GC > Chapter 6 > Lesson 6.1.3 > Problem 6-24

Use your theorems about parallel lines and the angles formed with a third line to find the measures of the labeled angles below. Show each step you use and be sure to **justify** each one with an angle conjecture from your Angle Relationships Toolkit. Be sure to write down your **reasoning** in the order that you find the angles.

There are multiple correct ways to find the angle measures.

If parallel lines are cut by a transversal, then

corresponding angles have equal measures.

Vertical angles must also have equal measures.The

angle corresponds to which angle? because corresponding angles on parallel lines have equal measures.because vertical angles have equal measures.because they are supplementary angles.So what is

?,,

,,Make sure you write down your reasoning.