Odpowiedź:
[tex]d = a \sqrt{2} = 12 \\ \\ a = \frac{12}{ \sqrt{2} } \\ a = 6 \sqrt{2} \\ p = {a}^{2} \\ \\ p = {(6 \sqrt{2}) }^{2} = 36 \times 2 = 72[/tex]
[tex]Zadanie\\\\d=12\ (j)\\\\P=\frac{d^2}{2}\\\\P=\frac{12^2}{2}=\frac{144}{2}=72\ (j^2)[/tex]
