Answer:
m∠ABF = 138°
Step-by-step explanation:
We know that ∠ABD = 84°.
We also know that FBE bisects ∠ABD.
This means that ∠ABE and ∠EBD are equal to [tex]\frac{84}{2}=42[/tex].
The angle of ∠ABF is equal to [tex]180-42=138[/tex].
So m∠ABF = 138°
