Glencoe Math: Course 3, Volume 2
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Glencoe Math: Course 3, Volume 2 View details
1. Lines
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Exercise 17 Page 377

Let's consider the given diagram.

angles

We are told that line is parallel to line We are also told the measures of two angles, and Let's add this information to our diagram.

angles

To find the measure of we will use the fact that corresponding angles of parallel lines are congruent.

angles
Since and are corresponding angles and lines and are parallel, these angles are congruent.