Question

diagonal of a square ........?

Answer 1

let it side of a square be of X units .

as we know that all the sides of a square are equal and they intersect at right angles
so we can use Pythagoras Theorem to find out the length of its diagonal

Answer 2

heya meta here is ur Answer ✍️✍️
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by Pythagoras theorem we get the formula of diagonal of a square as..

$\sqrt{2} a$
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hope it helps u❤️❤️