PDF chapter test TRY NOW

Prob 5.png
 
If \(PA\) \(=\) 3 \(cm\), \(QA\) \(=\) 6 \(cm\) and \(PR\) \(=\) 12 \(cm\), then find the length of \(QR\).
 
Answer:
 
The length of \(QR\) \(=\)  \(cm\).