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Name _______________________________________ Date __________________ Class __________________ Practice A Lines and Angles Complete the statements by matching the correct term. 1. ______________________ lines are not coplanar. They are not parallel and do not intersect. parallel skew 90 or right intersect 2. Parallel planes are planes that do not ______________________. 3. Perpendicular lines () intersect at _______________________ angles. 4. ____________________ lines (||) are coplanar and do not intersect. For Exercises 5–8, identify each of the following in the figure. 5. a pair of parallel segments _________________________ 6. a pair of skew segments _________________________ 7. a pair of perpendicular segments _________________________ 8. a pair of parallel planes _________________________ Refer to the figure to match the correct terms for Exercises 9–13. 9. A transversal is a line that intersects two coplanar _____________________ at two different points. The transversal j and the other two lines k and form eight angles. 10. _____________________ angles lie on the same side of the transversal j, on the same sides of lines k and . outside same corresponding lines alternate 11. Alternate exterior angles lie on opposite sides of the transversal j, _____________________lines k and . 12. _____________________ interior angles lie on opposite sides of the transversal j, between lines k and . 13. Same-side interior angles lie on the _____________________ side of the transversal j, between lines k and . 14. Sudeep walks back and forth along parallel segments in his yard. Then he walks back diagonally across the yard. Identify each of the following in the figure. a. a transversal ________________________________________ c. alternate interior angles ________________________________________ b. corresponding angles _________________________________________ d. alternate exterior angles _________________________________________ Original content Copyright © by Holt McDougal. Additions and changes to the original content are the responsibility of the instructor. Holt McDougal Geometry Name _______________________________________ Date __________________ Class __________________ Answers for the chapter Parallel and Perpendicular Lines Practice C LINES AND ANGLES 1. Practice A 1. Skew 2. intersect 3. 90° or right 4. Parallel Lines j and are parallel. 5. AC EG 2. 6. AC and Dh are skew. 7. CG EG 8. plane ABD plane EFH 9. lines 10. Corresponding 11. outside 12. Alternate 13 same 14. line r Lines j and are skew. 3. 15. 1 and 3 or 2 and 4 16. 2 and 3 17. 1 and 4 Lines j and are perpendicular. Practice B 4. 1. BE AD 2. AB and CF are skew. 3. CF EF Lines j and are parallel. 4. plane ABC plane DEF 5. line z 6. lines x and y 5. X 10; O 10 7. Sample answer: 1 and 3 6. X 40; O 70 8. Sample answer: 2 and 6 7. 9. Sample answer: 1 and 5 10. Sample answer: 2 and 3 11. transv.: utility pole; same-side interior angles 8. 12. transv.: tension wire; alternate exterior angles 13. transv.: telephone line; corresponding angles 14. transv.: utility pole; alternate interior angles y 5 2x 1 1 Reteach 1. g h 2. j and h 3. j g 4. Possible answers: EH or FJ Original content Copyright © by Holt McDougal. Additions and changes to the original content are the responsibility of the instructor. Holt McDougal Geometry