Respuesta :

The whole line is called a straight line and it has to equal 180° when we add it.  We know that Angle M = 128° so Angle W = 128°.
 
180 - 128 = Angle Z 
180 - 128 = 52
52°

Angle Z = B. 52°

Check:- 

52 + 128 = 180
Correct!

Angle Z = B. 52°