Answer:
Alternate interior Angles Theorem
Step-by-step explanation:
We are given that Maria drew two parallel lines KL and MN intersected by a transversal PQ.
Transversal PQ intersect KL at point R and MN at S.
Given
We have to find that which theorem could be used to show the measure of angle KRQ is equal to the measure of angle PSN.

Reason: Alternate interior angles theorem
Answer: Alternate interior Angles Theorem