steps:1. m angle 1=40 degrees, m angle 2=40 degrees2. m angle 1 + m angle 3 = m angle ABD3. angle 2 and angle ABD are supplementary4. m angle 2 + m angle ABD = 180 degrees5. m angle 2 + m angle 1 + m angle 3 = 180 degrees6. 40 degrees + 40 degrees + m angle 3 = 180 degrees7. 80 degrees + m angle 3 = 180 degrees8. m angle 3 = 100 degreesanswers:A. 1. given2. angle Add. post.3. vert. angle s Thm.4. def. of supp. angle s5. subst. prob. of =6. add. prop. of =7. simplify8. mult. prop. of =B.1. given2. angle sub. post.3. lin. pair thm.4. def. of comp. angle s5. add. prop. of =6. subst. prop. of =7. simplify8. subt. prop. of =C.1. given2. angle add. post.3. lin. pair thm.4. def. of supp. angle s5. subst. prop. of =6. subst. prop of =7. simplify8. subt. prop. of =D.1. given2. angle add. post.3. vert angle s thm.4. def. of comp. angle s5. add. prop. of =6. add. prop. of =7. simplify8. mult. prop. of =

Identify the correct justification for each step, given that m.