In the following figure, if O is the center of the circle and `bar(AB)` is the diameter, then find `angleACB`.

In the adjoining figure, O is the centre of the circle and AB is its diameter. If AC=8 cm and BC= 6cm, then find the radius of the circle.

In the adjoining figure, O is the centre of the circle and AB is its diameter. If AC=8 cm and BC= 6cm, then find the radius of the circle.

In the adjoning figure O is the centre of the circle and AB is the diameter. Tangent PQ touches the circle at D. angleBDQ=48^@ . Find the ratio of angleDBA:angleDCB.

In the given figure, O is the centre of the circle and angleACB=25^@ Find angleAOB

In the adjoining figure, O is the center of the circle and AC is a diameter of it If DC||EB, angleAOB=80^(@)andangleACE=10^(@) , then find the value of angleBED.

In the adjoining figure O is the centre of the circle and AB is the diameter. Tangent PQ touches the circle at D. angleBDQ = 48^(@) . Find the ratio of angleDBA: angleDCB :

In the adjoining figure ,O is the center of the circle and AB is a diameter. If angleAOD=140^(@)andangleCAB=50^(@) , then find value of angleBED

In the given figure (not to scale), O is the center of the circle C_(1) and AB is the diameter of the circle C_(2) . Quadrilateral PQRS is inscribed in the circle with center O. Find angleQRS .

In the figure, O is the center of the circle and BO is the bisector of /_ ABC show that AB=BC