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Question
Triangle PQR is right-angled at vertex R. Calculate the length of PR, if: PQ = 34 cm and QR = 33.6 cm.
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Solution
Given: ∆PQR right angled at R and PQ = 34 cm, QR = 33.6 cm.
To find: Length of PR.
According to Pythagoras' Theorem,
PR2 + QR2 = PQ2
PR2 + 33.62 = 342
PR2+ 1128.96= 1156
PR2 = 1156 − 1128.96
PR = `sqrt27.04`
∴ PR = 5.2 cm
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