Ob = 3a
3a = 18
a = 6 dm
[tex]P = \frac{a^{2}\sqrt{3} }{4} = \frac{6^{2}\sqrt{3} }{4} = \frac{36\sqrt{3} }{4} =9\sqrt{3}dm^{2} \\[/tex]
Odp. D
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Ob = 3a
3a = 18
a = 6 dm
[tex]P = \frac{a^{2}\sqrt{3} }{4} = \frac{6^{2}\sqrt{3} }{4} = \frac{36\sqrt{3} }{4} =9\sqrt{3}dm^{2} \\[/tex]
Odp. D