Wzory :
[tex]d=a\sqrt2\\\\P=a^2\\\\Ob=4a[/tex]
I)
[tex]a\sqrt2=\sqrt{72} \ \ |\cdot\sqrt2\\\\2a=\sqrt{144}\\\\2a=12 \ \ |:2\\\\a=6\\\\P=6^2=36\\\\Ob=4\cdot6=24[/tex]
II)
[tex]a\sqrt2=20 \ \ |\cdot\sqrt2\\\\2a=20\sqrt2 \ \ |:2\\\\a=10\sqrt2\\\\P=(10\sqrt2)^2=10^2\cdot(\sqrt2)^2=100\cdot2=200\\\\Ob=4\cdot10\sqrt2=40\sqrt2[/tex]
