Selected Answers for Core Connections, Course 3 Lesson 9.1.1 9-8. a: = ||, alt. int. =, = 117, suppl. s s. m2 m3 b: 3x 18º74º, = 30.67º, lines ||, corr.s =. x – c: 3x 9º = + 25º, lines ||, alt. int. =, = 17º; = 3(17º) 9º42º, substitution. s x x m2 – – 9-9. Answers will vary. = 53º, = 72º, = 55º, = 127º, = 55º m1 m2 m3 m4 m6 9-10. a: Yes, positive b: Yes c: No d: The short people may be young and have not yet learned to spell very well. , miles 9-11. 9-12. 3 p.m. 9-13. a: Yes b: No c: No d: Yes e: No f: Yes Lesson 9.1.2 9-21. a: 55, right b: 60, acute 9-22. a: = (alt. int. s =) or = (corr. s =), then st. , = m4 m5 m4 m8 m6 + = 180 degrees (same side interior suppl.). s m4 m6 corr. and vert. or vert. alt. int. vert. 8 = 48 b: s s, s, s, m
Selected Answers for Core Connections, Course 3 Lesson 9.1.1 9-8. a: m2 = ||, alt. int. s =, m3 = 117, suppl. s. b: 3x – 18º74º, x = 30.67º, lines ||, corr.s =. c: 3x – 9º = x + 25º, lines ||, alt. int. s =, x = 17º; m2 = 3(17º) – 9º42º, substitution. 9-9. Answers will vary. m1 = 53º, m2 = 72º, m3 = 55º, m4 = 127º, m6 = 55º 9-10. a: Yes, positive b: Yes c: No d: The short people may be young and have not yet learned to spell very well. 9-11. , miles 9-12. 3 p.m. 9-13. a: Yes b: No c: No d: Yes e: No f: Yes Lesson 9.1.2 9-21. a: 55, right b: 60, acute 9-22. a: m4 = m5 (alt. int. s =) or m4 = m8 (corr. s =), then st. , m6 = m4 + m6 = 180 degrees (same side interior s suppl.). b: corr. and vert. s or vert. s, alt. int. s, vert. s, m 8 = 48