1.
[tex]h = \frac{a\sqrt{3}}{2}\\oraz\\h = 18\sqrt{3} \ cm\\\\\frac{a\sqrt{3}}{2} = 18\sqrt{3} \ \ /\cdot\frac{2}{\sqrt{3}}\\\\a = 36 \ cm\\\\\\P = \frac{a^{2}\sqrt{3}}{4}\\\\P = \frac{36^{2}\sqrt{3}}{4} = \frac{1296\sqrt{3}}{4}\\\\\underline{P = 324\sqrt{3} \ cm^{2}}[/tex]
2.
[tex]Obw = 4,8 \ dm = 48 \ cm\\oraz\\Obw = 6a\\\\6a = 48 \ \ /:6\\\\\underline{a = 8 \ cm}[/tex]
[tex]P = \frac{3a^{2}\sqrt{3}}{2}\\\\P = \frac{3\cdot8^{2}\sqrt{3}}{2} = \frac{3\cdot64\sqrt{3}}{2} = 3\cdot32\sqrt{3}\\\\\underline{P = 96\sqrt{3} \ cm^{2}}[/tex]
