Question

a diagonal de um quadrado mede 15.2cm qual é a medida do perímetro desse quadrado​

Answer 1

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$\sf{D=\ell\sqrt{2}}\\\sf{15,2=\ell\sqrt{2}}\\\sf{\ell=\dfrac{15,2}{\sqrt{2}}}\\\sf{\ell=\dfrac{15,2\sqrt{2}}{2}}\\\sf{\ell=7,6\sqrt{2}~cm}\\\sf{2p=4\ell}\\\sf{2p=4\cdot7,6\sqrt{2}}\\\huge\boxed{\boxed{\boxed{\boxed{\boxed{\sf{2p=30,4\sqrt{2}~cm}}}}}}$