Q. 103.8( 10 Votes )

P and Q are point

Answer :

There are two triangles here, ∆APQ and ∆ABC. We shall prove these triangles to be similar.


&



Also, A = A [common angle]


So by AA-similarity criteria,


∆APQ ∆ABC


Thus,



And we know


BC = 3×PQ


Hence, proved.


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