In the given figure, O is the centre of a circle.
Question:
In the given figure, O is the centre of a circle. If ∠OAC = 50°, then ∠ODB = ?
(a) 40°
(b) 50°
(c) 60°
(d) 75°

Solution:
(b) 50°
∠ODB =∠OAC = 50° (Angles in the same segment of a circle)