Answer:
79.5 degrees
Step-by-step explanation:
We need to use CPCTC, which basically says that if two triangles are congruent their corresponding parts are also congruent. In this case, angle m and angle p are corresponding. We can set them equal to one another.
5x-19=3x+20.4
2x-19=20.4
2x=39.4
x=19.7
Plug x into the measure of angle p.
3(19.7)+20.4
59.1+20.4
79.5
