Diagonal of square

Calculate the side of a square when its diagonal is 10 cm.

Correct result:

a =  7.071 cm


u=10 a=u/2=10/2=5 2=7.071 cmu=10 \ \\ a=u / \sqrt{ 2 }=10 / \sqrt{ 2 }=5 \ \sqrt{ 2 }=7.071 \ \text{cm}

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