Answer:


Step-by-step explanation:
We have been given an isosceles triangle being two sides equal AB and AC
By the property of isosceles triangle
The sides which are equal will have same base angle
Hence, ∠ABC=∠ACB=
We know that sum of angles of triangle is 
∠ABC+ ∠ACB+∠BAC=
(1)
Since, ∠BAC is the bisector so, ∠BAD and ∠DAC are equal which is 
Now, substituting the values in (1) we get:



Now, we will consider ΔABD to find x
,∠ADB=
∠ABD=
Now, Apply the sum of angles of triangle is
we get:


