CircleHard

Question

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

Options

A.
B.
C.
D.

Solution

       
From figure it is clear that ᐃPRQ and ᐃRSP are similar.
∴      
⇒       PR2 = PQ.RS
⇒      
⇒      

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