Respuesta :

I think it might me 70+150-360?
hermionegranger59

a = 70° [because vertically opposite angles are equal.]

c + 150° = 180° [They are linear pair]

=> c = 180° - 150°

=> c = 30°

a+b+c= 180° [Sum of all angles of a triangle=180°]

=> 70° + b + 30° = 180°

=> 100° + b = 180°

=> b = 180° - 100°

=> b = 80°