Respuesta :

Answer:

∠ABC = 39°

Step-by-step explanation:

Since ED bisects ∠CBD :

∠EBD = ∠CBE = 30°

Now, ∠ABD = ∠ABC + ∠CBE + ∠EBD = 99°

Solving :

  • 99° = ∠ABC + 30° + 30°
  • ∠ABC = 99° - 60°
  • ∠ABC = 39°