Respuesta :

Answer:

C. 105°

Step-by-step explanation:

So we know that ∠4≅∠5 because the alternate exterior angles on a line traversal to two parallel lines are congruent. So m∠5=75°.  And since ∠1 and ∠5 are a linear pair m∠1+m∠5=180°.  Than simplify m∠1 +75°=180°.  m∠1=105°

abooshka11

Answer:

C, 105°

Step-by-step explanation:

4 and 5 are the same angle since they are opposite exterior. This means both 4 & 5 = 75°. Since angle 1 and 5 must equal 180° angle 1 is equal to 105°