Ononot — In \triangle PQR, the coordinates are P(0, 0), Q(4, 0), and

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Euclidean 2Dmedium

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In $\triangle PQR$ , the coordinates are $P(0, 0)$ , $Q(4, 0)$ , and $R(1, 7)$ . What is the length of the altitude from $R$ to the side $PQ$ ?