Answer:
16. 125°
17. 55°
18. 110°
19. b
20. parallel
Step-by-step explanation:
16. m∠8=m∠1=125°
17. m∠5= m∠180°m∠1= 180° - 125 = 55°
18. m∠2+m∠4 = 2m∠5 = 100°
m∠2 = m∠5 m∠2 = m∠4
m∠2 + m∠4 = 55° x 2 = 110°
19. Line b is parallel to line a
20. line a and b are parallel line.
