`O` is the center of circle, `angle ACB = 40^@` Find `angle OAB`

In the figure 'O' is the centre of the circle angle AOB = 100^@ find angle ADB

In the figure 'O' is the centre of the circle angle AOB = 100^@ find angle ADB

In the figure 'O' is the centre of the circle angle AOB = 100^@ find angle ADB

In the diagram , O is the centre of the circle and angle OPA=30^@ , Find angle ACB and angle ADB respectively.

In the circle with centre O and A,B,C are the points on the circle, angle AOB = 60^(@) . Find angle ACB

In the figure, O is centre of a circle. If angle BAC = 20^(@) and angle ACB = 30^(@) . Find angle AOC

In the given figure,Ois the centre of a circle and angle OAB = 50^@ . Then, angleBOD is equal to