Odpowiedź:
[tex]h=12\\h = \frac{a\sqrt{3} }{2} \\\\12 = \frac{a\sqrt{3} }{2} /*2\\24= a\sqrt{3} /:\sqrt{3}\\\frac{24}{\sqrt{3}} = a\\a= \frac{24}{\sqrt{3}} * \frac{\sqrt{3}}{\sqrt{3}} = \frac{24\sqrt{3} }{3} = 8\sqrt{3} \\P = \frac{a^{2}\sqrt{3} }{4}\\P = \frac{(8\sqrt{3})^{2}*\sqrt{3} }{4}\\P = \frac{64\sqrt{9} * \sqrt{3} }{4}\\P = \frac{64*3\sqrt{3} }{4} \\P= \frac{192\sqrt{3} }{4} \\P= 48\sqrt{3} cm^{2}[/tex]
