PDF chapter test TRY NOW

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In the adjacent figure, \(QA\) and \(PB\) are perpendiculars to \(AB\). If \(AO = 10 \ cm\), \(BO = 6 \ cm\) and \(PB = 9 \ cm\). Find \(AQ\).
 
The length of \(AQ\) \(=\) \(cm\)