Respuesta :

wminu05

Answer:

b + e = 180°

Step-by-step explanation:

lines x and y are parallel. Therefor angles b and c are allied angles. That means;

b + c = 180°

Furthermore, angle c = angle e. (they're vertically opposite angles)  

b + c = 180° (Proved above)

c = e (Proved above)

∴ b + e = 180°