geometry
posted by sally .
5. The lengths of segments PQ and PR are 8 inches and 5 inches, respectively, and they make a 60degree angle at P.
(a) Find the area of triangle PQR.
(b) Find the length of the projection of segment PQ onto segment PR.
(c) Find the length of segment QR.
(d) Find the sizes of the other two angles of triangle PQR.
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