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Question
Triangle ABC is right-angled at vertex A. Calculate the length of BC, if AB = 18 cm and AC = 24 cm.
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Solution
Given: ∆ ABC right angled at A and AB = 18 cm, AC = 24 cm.
To find: Length of BC.
According to Pythagoras Theorem,
BC2 = AB2 + AC2
= 182 + 242 = 324 + 576 = 900
∴ BC =`sqrt900=sqrt(30xx30)` = 30 cm
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