3-1
Name
Class Date __________________
Date
Name ________________________________________
Class __________________
Practice
Additional
Practice
2
Lines and Angles
Chapter
For Exercises 1–3, refer to the figure from the lesson, shown at
the right.
1. What is true of the measures of any two angles labeled with
the same number? Explain how you know.
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2. What is the sum of the measures of the angles labeled 5 and 6? Explain how
you know.
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3. Identify any other angle pairs in the figure for which the sum of the angle
measures is the same as for the pair in Exercise 2.
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For Exercises 4–7, refer to the figure, in which x and y are
parallel lines.
© Houghton Mifflin Harcourt Publishing Company
4. Identify a transversal. _________________________________
5. Identify all pairs of vertical angles. ______________________
6. Suppose you know that m∠2 = m∠4 = 50°. Find the measure of
each numbered angle.
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7. Given that m∠2 = m∠4, what do you know about ∠2 and ∠3? Explain
your reasoning.
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Chapter
3 Copyright © by Holt McDougal. Additions and changes 93
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Lesson 1
Holt McDougal Geometry