In the adjoining figure, O is the centre of the circle. AB is an arc of the circle and `/_AOB=80^(@)`. Find `/_ACB`.

In the following figure, O is the centre of the circle. AB is an arc of the circle, such that angle AOB=80^@ .Find angle ACB .

In the adjoining figure, O is the centre of the circle. Find the value of angle BEC .

In the adjoining figure, O is the centre of the circle. AB and CD are equal chords. If /_AOB =100^(@) , then find /_CED .

In the adjoining figure , O is the centre of the circle. If angleACB=25^@ , then find angleAOB .

In the adjoining figure, O is the centre of the circle, Prove that anglex=angley+anglez .

In the above figure, O is the centre of the circle AB,AD and CD are the chords . If /_ ADC=130^(@) then fid /_ ACB .

In the adjoining figure, O is the centre of circle. If angle DAB=50^@ find the values of x and y.

In the adjoining figure 'O' is the center of the circle AB=BCm/_AOD=x and m/_ACB=y then find (x)/(y) .

In the adjoining figure, O is the centre of the circle. If the chord AB is equal to the radius of the circle, then find the value of angleADB .

In the adjoining figure , O is the centre of the circle and angleOAB=60^(@) . Find angle APC .