Pole jednej ściany
[tex] \frac{ {a}^{2} \sqrt{3} }{4} = \frac{ {7}^{2} \sqrt{3} }{4} = \frac{49 \sqrt{3} }{4} {cm}^{2} [/tex]
Pole całkowite
[tex] \frac{49 \sqrt{3} }{ \not4} \times \not4 = 49 \sqrt{3} {cm}^{2} [/tex]
[tex] \huge{ \boxed{ \boxed{Odp.D}}}[/tex]
