In a periscope, a pair of mirrors is mounted parallel to each other as given. The path of light becomes a transversal. If ∠2 evaluate 50°, what is the evaluation of ∠3?

a. 50°

b. 40°

c. 130°

d. 310°

a. Two parallel lines remove by a transversal form alternate interior angles that are congruent. The two parallel lines are prepared by the mirrors, and the path of light is the transversal. Thus, ∠2 and ∠3 are alternate interior angles that are congruent. If ∠2 calculate 50°, ∠3 is also 50°. If you select b, your mistake was considering ∠2 and ∠3 are complementary angles. If you select c, your mistake was considering ∠2 and ∠3 are supplementary angles.