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

Dear Sanvy, Consider a Rectangle with sides ABCD It has diagonals AC and AD
We have AB=12cm 
BC=5cmBC=5cm

Find AC

We know that by Pythagoras theorem

AC²=AB²+BC²

=12²+5

=144+25

=169

AC=169−−− √AC=169

=13

Hence the length of the diagonal is 13cm13cm

Answer: 13 cm

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Updated on: 10-Oct-2022

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