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Homework: pg. 202 #s 6-24 6. DE and BC (possible answer) 7. AB and DE 8. AD and DE 9. plane ABC and plane DEF 10. l; alternate interior angles 11. n; corresponding angles 12. l; same-side interior angles 13. m; alternate exterior angles 14. 90 15. 26x + 22 = 38x – 14; x = 3; Angle KLM = 100 16. 33x + 35 = 26x + 49; x = 2; Angle DEF = 79 17. 17x + 8 = 13x + 24; x =4; Angle QRS = 76 18. Converse of alternate interior angles theorem 19. Converse of Corresponding Angles Postulate 20. Angle 6 = 66, angle 3 = 114. 66 + 114 = 180. Converse of Same-side Interior Angles Theorem 21. angle 1 and 7 both = 99. Converse of Alternate Exterior Theorem 22. KM 23. x – 5 < 8; x <13 24. 1. AD is parallel to BC, AD is perpendicular to AB, and DC is perpendicular to BC 2. AB is perpendicular to BC 3. AB is parallel to CD Given Perpendicular Transversal Theorem 2 lines perpendicular to same line 1 lines parallel.