The sides forming the right angle of a right angled triangle are 7 cm and 5 cm. Find the length of its hypotenuse.

In ∆ABC, AB = 5cm, BC = 7cm ∠B = 90°

By Pythagoras theorem

Hypotenuse2 = Perpendicular2 + Base2

AC2 = AB2 + BC2

= (5)2 + (7)2

= 25 + 49

= 74

Hence, AC2 = 74

∴ AC =

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