In the given figure PQ & RS are two parallel tangents to a circle o and another tangent AB with point of contact C intersecting PQ at A and RS at B. Prove that `angleAOB = 90^@`

In the given figure ,XY and XY 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'Y' ar B.Prove that angleAOB=90^(@)

In the given figure 4.13 ,xy and x'y' 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'y' at B. Prove that angle AOB =90^@ .

In the given figure PQ || RS , prove that Delta POQ~Delta SOR.

In the figure PR and QS are two diameters. Is PQ = RS?

In the given figure, AB, BC and Ac are tangents to the circle at P,Q and R. If AB = AC, show that Q is the mid-point of BC.

In the given figure AB, AC, and PQ are tangents. If AB=5cm , find the perimeter of APQ.

Prove that the tangents to a circle at the end points of a diameter are parallel.

In the given figure,PQ,PR and BC are the tangents to the circle,BC touches the circles ,at X.If PQ=7cmthen find the perimeter of DeltaPBC

In the figure, PQ is a chord of length 8 cm of a circle of radius 5 cm. The tangents at P and Q intersect at T. Find TP and TQ.

In the given figure, AP and BP are tangents to a circle with centre O such that AP=5 cm and |__APB=60^(@) . Find the length of chord AB.