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. _________________________________________ _________________________________________ _________________________________________ 2. What is the sum of the measures of the angles labeled 5 and 6? Explain how you know. _________________________________________________________________________________________ _________________________________________________________________________________________ 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. _________________________________________________________________________________________ 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. _____________________________________________________________ 7. Given that m∠2 = m∠4, what do you know about ∠2 and ∠3? Explain your reasoning. _________________________________________________________________________________________ _________________________________________________________________________________________ _________________________________________________________________________________________ Chapter 3 Copyright © by Holt McDougal. Additions and changes 93 Original content to the original content are the responsibility of the instructor. 93 Lesson 1 Holt McDougal Geometry