Circle 3 Question 9

9. Let PQ and RS be tangents at the extremities of the diameter PR of a circle of radius r. If PS and RQ intersect at a point X on the circumference of the circle, then 2r equals

(2001, 1M)

(a) PQRS

(b) PQ+RS2

(c) 2PQRSPQ+RS

(d) PQ2+RS22

Objective Questions II

(One or more than one correct option)

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Answer:

Correct Answer: 9. (a)

Solution:

  1. From figure, it is clear that PRQ and RSP are similar.

PRRS=PQRPPR2=PQRSPR=PQRS2r=PQRS



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