XY and X'Y' are two parallel tangents to the circle with centre at O. Antoher tangent AB touches the circle at C and XY at A and X'Y' 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 Fig.10.13, XYandX'Y' are two parallel tangent 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 angleAOB=90^@ .

In Fig, 10.13, XY and X'Y' are two parallel tangents to a circle with centre O and another tangent AR with point of contact C intersecting XY at A and X'Y' at B. Prove that angle AOB=90^@ .

In Fig 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 and X'Y' at B , prove that angle AOB = 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 figure XY and X'Y' are two parallel tangents to a circle with centre O and another tangent AB with point of cantact C intersecting XY at A and X'Y' at B then angle AOB=

X Y and Xprime Yprime are two parallel tangents to a circle with centre O and another tangent AB with point of contact C intersecting X Y at A and XprimeYprime at B. Prove that /_A O B\ =\ 90^0