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7 February, 17:37

A rectangle is 7cm wide and 10cm long. find the length of a diagonal of the rectangle

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  1. 7 February, 20:08
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    This question requires you to use Pythagoras' Theorem: c^2 = a^2 + b^2, where c is the length of the diagonal and a and b are the width and length of the rectangle

    c^2 = 7^2 + 10^2

    c^2 = 49 + 100

    c^2 = 149

    c = sq. root of 149 (as an exact answer) or 12.207 cm (to three decimal places)
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