In A PqR, scy pm. is a medion PM = 9 onl
pg²+ PR² - 2go find the length of QR
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PQ2+PR2=2PM2+ QM2+RM2290= 2X81+ 2 QM2. (QM=RM)290- 152=2QM2128/2= QM2QM=8QR=
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