As shown in the figure, AB and CD are two common tangents to circles with centres `O_(1) and O_(2)` and different radius. Prove that AB=CD

Choose the correct answer and give justification for each. In the figure XY and X^(1)Y^(1) are two parallel tangents to a circle with centre O and another tangent AB with point of contact C intersecting XY at A and X^(1)Y^(1) at B then /_AOB=

In the given figure, AB and CD are two diameters of a circle (with centre O) perpendicular to each other and OD is the diameter of the smaller circle. If OA = 7 cm, find the area of the shaded region.

In the given figure. If TP and TQ are the two tangents to a circle with centre O so that angle POQ= 110^(@) , then angle PTQ is equal to …….

In the figure , if AB = CD and angle AOB - 90^@ find angle COD

If a line intersects two concentric circles (circles with the same centre) with centre O at A,B,C and D), prove that AB= CD

In the given figure, Rq is a tangent to the circle with centre O. if SQ = 6cm and QR = 4cm. Then. OR = ……….cm.

In the adjacent figure, AB is a chord of circle with centre O. CD is the diameter perpendicualr to AB. Show that AD = BD

In the adjacent figure, there are two concentric circles with centre ‘O’. Chord AD of the bigger circle intersects the smaller circle at B and C. Show that AB = CD.

In the given figure AB and CD bisect each other at O. Prove that AC = BD.