Answer:
m<R = 121°
D.
Step-by-step explanation:
According to triangle angles sum theorem, all angles in a triangle is equal to 180°
Given that <P + <Q = 59
<P + <Q + <R = 180°
59 + <R = 180
59 -59 + <R = 180 - 59
Triangles always equal 180
Lets call angle R x
x+59=180
Subtract 59 on both sides
x= 121
So angle R= 121
