Q7 of 93 Page 10

Prove that the intercept of a tangent between two parallel tangents to a circle subtends a right angle at the centre.

Three tangent AB,CD and BD of a circle such as AB and CD are two parallel tangent BD intercept an angle BOD at the centre.

To Prove:

If the sides of a quadrilateral touch a circle, prove that the sum of a pair of opposite sides is equal to the sum of the other pair.

If AB, AC, PQ are tangents in Fig. 10.51 and AB = 5 cm, find the perimeter of .

In Fig. 10.52, PQ is tangent at a point R of the circle with centre O. If , find .

If PA and PB are tangents from an outside point P. such that PA = 10 cm and . Find the length of chord AB.