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Weekly Problem 43 - 2015

Stage: 3 and 4 Challenge Level: Challenge Level:1

           $PQR$ is a triangle and $S$ is a point on $QR$. 
       
           $QP=QR=9$ cm and $PR=PS=6$ cm.


           What is the length of $SR$?
 





This problem is taken from the UKMT Mathematical Challenges.

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