In a triangle ABC, ANGLE ABC=ANGLE ACB + ANGLE CAB, find the value of angle ABC with the help of statements and reasons

given: ABC  is a triangle and ∠ABC = ∠ACB + ∠ CAB.........(1)

since the sum of interior angles are 180 deg.

thus 

thus ∠ABC = 90 deg

hope this helps you.

cheers!!