Question

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Answer 1

C, 105°

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°

Answer 2

C. 105°

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°