Answer:
∠ABC = 56°
Explanation:
The equilateral triangle is irrelevant and can be ignored.
The angle marked 62° is one of the base angles of the isosceles triangle. The other base angle (at D) will have the same measure. The sum of angles in a triangle is 180°, so you have ...
∠A +∠D +∠B = 180°
62° +62° +∠B = 180°
∠B = 180° -124° = 56°
The measure of ∠ABC is 56°.