In a right triangle PQR, ∠Q=90°.
a) If PQ=7cm, QR=24cm, find PR.
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Answer:
by Pythagoras theorem..
(PQ)² + (QR)² = (PR)²
(PR)² = (7)² + (24)²
(PR)² = 49 + 576
(PR)² = 625
(PR) = √625
PR = 25
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