Skills Practice Angles and Parallel Lines - Mrs. Foy's Classroom
Skills Practice Angles and Parallel Lines - Mrs. Foy's Classroom
Skills Practice Angles and Parallel Lines - Mrs. Foy's Classroom
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NAME DATE PERIOD3-2<strong>Practice</strong><strong>Angles</strong> <strong>and</strong> <strong>Parallel</strong> <strong>Lines</strong>In the figure, m∠2 = 92 <strong>and</strong> m∠12 = 74. Find the measureof each angle. Tell which postulate(s) or theorem(s) you used.1. ∠10 2. ∠843 5 61 23. ∠9 4. ∠578m5. ∠11 6. ∠13nFind the value of the variable(s) in each figure. Explain your reasoning.119 10 1415161213rs7.(9x + 12)°8.3x°(4y - 10)°(5y - 4)°3y° (2x + 13)°Find x. (Hint: Draw an auxiliary line.)9.1100°50°10.11. PROOF Write a paragraph proof of Theorem 3.3.Given: l || m, m || nProve: ∠1 ∠1212. FENCING A diagonal brace strengthens the wire fence <strong>and</strong> preventsit from sagging. The brace makes a 50° angle with the wire as shown.Find the value of the variable.62°1144°9 1011 121 23 45 67 8y°k50°lmnCopyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.Chapter 3 34 Glencoe Geometry