The vertices of quadrilateral PQRS are: P(4,7), Q(8, 4), R(-1, -8), and S(-5, -5). What are the lengths of sides PQ and RS?

Letter c i’d say

“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .