in a triangle ABC, AB=AC AB is produced to D such that BD=BC show that angle ACD = (Angle ADC - Maths - Lines and Angles

Question

in a triangle ABC, AB=AC AB is produced to D such that BD=BC show
that angle ACD = (Angle ADC *3)

Manbar Singh · Accepted Answer

In ∆ADC, DE bisects ∠D, soADDC = AEEC   angle bisector theorem   
1In ∆ABC, BE bisects ∠B, soABBC = AEEC   angle bisector theorem   
2from 1 and 2,ADDC =ABBC

in a triangle ABC, AB=AC.AB is produced to D such that BD=BC.show that angle ACD = (Angle ADC *3)