(i)The angle between a tangent to a circle and the radius drawn at the point of contact is
(ii)From a point Q, the length of the tangent to a circle is 24 cm .and the distance of Q from the center is 25cm.The radius of the circle is
(iii) If AP and AQ are the two tangents a circle with center O, so that ∠POQ = 110° , then ∠PAQ is equal to
(iv) If tangents PA and PB from a point P to a circle with center O are inclined to each other at angle of 80°, then ∠POA is equal to
(v) In the figure XY and X1Y1 are two parallel tangents to a circle with center O and another tangent AB with point of contact C intrsecting XY at A and X1Y1 at B then ∠AOB =