Answer:
Part 1:
∠LNM = 38°
Part 2:
∠ M = x = 52°
Step-by-step explanation:
Part 1:
A straight line (straight angle) has a measure of 180°
From the figure, we can say:
PNM + LNM = 180
142 + LNM = 180
∠LNM = 180 - 142 = 38°
Part 2:
Now, for angle M, we recognize that sum of 3 angles of a triangle is 180°
Thus,
90 + 38 + x = 180
128 + x = 180
x = 180 - 128
x = 52°