In the following figure, O is the centre of the cir-cle, AC are parallel lines. If `angleACO = 80^@,` thenfind `angleADO.`

In the following figure,O is the centre of the cir-cle,AC are parallel lines.If /_ACO=80^(@), thenfind /_ADO

In the following figure, O is the centre of the circle , AC is the diameter and if angle APB =120^@ , then find angle BQC .

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 and AC is its diameter. If angleBAC=30^@ , then find angleBOC .

In the adjoining figure, O is the centre of the circle and AC is its diameter. If angleBAC=30^@ , then find angleBOC .

In the following figure,O is the centre of the circle,AC is the diameter and if /_APB=120^(@), then find /_BQC

In the given figure O is the centre of the circle. Tangents at A and B meets at C. If angleACO=30^(@) , find angleAPB

In the given figure O is the centre of the circle. Tangents at A and B meets at C. If angleACO=30^(@) , find angleBCO

In the given figure O is the centre of the circle. Tangents at A and B meets at C. If angleACO=30^(@) , find angleAOB