Answer:
49°
Step-by-step explanation:
arc AB subtends a central angle of 98°
Let O be the center of the circle.
∠OAB = ∠OBA = (180°-98°)/2 = 41°
Assuming that BC is tangent to the circle, ∠OBC = 90°
∠ABC = ∠OBC - ∠OBA = 90° - 41° = 49°
