Geometry problem involving triangle ABC with given angles and a point D on the extension of BC, asking to compare angle ∠ABD with angles ∠A and ∠C.
Triangle ABC with angles at A, B, and C labeled 30°, 150°, and 120° respectively, and a point D on the extension of line BC. The question asks to compare angles ∠ABD with ∠A and ∠C.