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Pythagorean Theorem

PQR is a tria...

Question

PQR is a triangle right angled at P. If PQ = 10 cm and PR = 24 cm, find QR.

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Solution

By applying Pythagoras theorem in ΔPQR,

(PQ)² + (PR)² = (RQ)²

(10)² + (24)² = RQ²

100 + 576 = (QR)²

676 = (QR)²

QR = 26 cm

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