Answer: m<P 30°
m<R 60°
Step-by-step explanation:
Start with what you’re give. The line that extends from angle R is 120°, the way triangles work is that the unknown angle plus the 120 should equal 180. So you subtract 120 from 180 to get angle R (60).
We know that a triangles angle always equal 180°. Now that we have two angle you use those to get P (it’s a right angle triangle so you know one angle is 90) and you now have angle R.
180 - 90 - 60 = 30°
