Question

Calculate the length of a diagonal of a square with side each 7cm long

Answer 1

`7√(2) \ cm`

Explanation:

Formula ………………………………………………

The length of a diagonal of a square with side of length “a” is :

`a√(2)`

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Since a = 7 (in our case) then

`\text{the length of the diagonal} =7√(2)`

Note : you can also use the Pythagorean theorem.