4. Q is between P and R. PQ=9 and QR=7 . Find PR.

To find the length of PR, we need to add the lengths of PQ and QR.<br /><br />Given:<br />PQ = 9<br />QR = 7<br /><br />To find PR, we add PQ and QR:<br />PR = PQ + QR<br />PR = 9 + 7<br />PR = 16<br /><br />Therefore, the length of PR is 16.