Marc is writing statements to prove that the sum of the measures of interior angles of triangle PQR is equal to 180°. Line m is parallel to line n.

Linen
P
450
85°
50°
Line m
Q
R
(not drawn to scale)

Which is a true statement he could write? (6 points)

1) Angle PRQ measures 45°.

2) Angle PQR measures 85°.

3) Angle PQR measures 40°.

4) Angle PRQ measures 50°.