O is the centre of the circle. A tangent is drawn which touches the circle at C. If ∠BCX = 50°, then what is the value (in degrees) of ∠AOC?
1
80°
2
50°
3
60°
4
20°
O is the centre of the circle. A tangent is drawn which touches the circle at C. If ∠BCX = 50°, then what is the value (in degrees) of ∠AOC?