Răspuns :
[tex]A = 64 \: {cm}^{2} [/tex]
[tex]A = {l}^{2} [/tex]
[tex] {l}^{2} = 64[/tex]
[tex]l = \sqrt{64} [/tex]
[tex]l = 8 \: cm[/tex]
[tex]d = l \sqrt{2} [/tex]
[tex]d = 8 \sqrt{2} \: cm[/tex]
[tex]A = {l}^{2} [/tex]
[tex] {l}^{2} = 64[/tex]
[tex]l = \sqrt{64} [/tex]
[tex]l = 8 \: cm[/tex]
[tex]d = l \sqrt{2} [/tex]
[tex]d = 8 \sqrt{2} \: cm[/tex]