In the adjoining figure, G,D,E,F are concyclic points of a circle with centre C.`/_ECF=70^@`,`m(arc DGF)=200^@` find (i)m arc DE.

In the adjoining figure, G,D,E,F are concyclic points of a circle with centre C. /_ECF=70^@ , m(arc DGF)=200^@ find m(arc DEF).

In the figure , points G,D,E,F are concyclic points of a cicle with centreC. /_ECF = 70^(@) m ( arc DGF ) = 200^(@) , find m(arc DE) and m(arc DEF ) .

In the adjoining figure, A,B and C are three points on a circle with centre O such that mangleAOB=110^@ , mangleAOC=120^@ . Find mangleBAC .

In the adjoining figure, a rectangle PQRS is inscribed in a circle with centre T. Prove that , (i) arc PQ cong arc SR (ii) arc SPQ cong arc PQR

In the adjoining figure ,seg DE is a chord of a circle with centre C. seg CF bot seg DE. If diameter of the circle is 20cm, DE=16cm , find CF . Recall and write theorems and properties which are useful to find the solution of the above problem. Using them solve the above problems.

In the adjoining figure,chord AC and chord DE intersect at point B.If /_ABE=108^@ and m(arc AE)=95^@ ,then find m(arc DC).

/_ACB is inscribed in arc ACB of a circle with centre O.If /_ACB=65^@ ,find m(arc ACB)

In the adjoining figure, square PQRS is a cyclic quadrilateral. side PQ~=side RQ./_PSR=110^@ . Find m(arc PQR)

In the adjoining figure, the radius of a circle with centre C is 6 cm. Line AB is a tangent at A. d(A,B)=6 cm, find d(B,C).

In the adjoining figure, seg AB is a diameter of a circle with centre O. Bisector of inscribed /_ACB intersects circle at point D. prove: seg AD~=seg BD