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Find the length of the diagonal of a rectangle whose sides are 12 cm and 5 cm.

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Find the length of the diagonal of a rectangle whose sides are 12 cm and 5 cm.

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ABCD is a rectangle

In ΔABC using pythagorous theorem,

AC2 = AB2 + BC2

AC2 = 122 + 52

AC2 = 144 + 25

AC2 = 169

AC = \(\sqrt{169}\)

AC = 13 cm

Therefore length of diagonal is 13 cm.

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