### Home > GC > Chapter 12 > Lesson 12.2.1 > Problem 12-56

12-56.

In Δ*PQR* at right, what is *mQ*? Explain how you found your answer. Homework Help ✎

There are multiple ways to find the measure of ∠*Q*.

Examine the quadrilateral *PQRS*. The sum of the interior angles should be 360°.