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    iLuvReading's Avatar
    iLuvReading Posts: 16, Reputation: 1
    New Member
    		  
    #1

    Nov 23, 2013, 09:00 PM
    A Tangent related question..
    Here's a question I am unable to solve because I don't know what a tangent is :P

    Q. Two circles of radii x and y touch each other externally ( x > y ). If AB is the common tangent then (AB)^2 is equal to _________.

    (a) 4xy (b) (x-y)^2 (c) (x + y) (d) (x + y)^2

    Please Answer..
    Scleros's Avatar
    Scleros Posts: 2,165, Reputation: 262
    Hardware Expert
    		  
    #2

    Nov 24, 2013, 01:47 AM
    See Wikipedia: Tangent.
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