Respuesta :
Answer:
[tex]216\sqrt{3}[/tex] [tex]cm^{2}[/tex]
Step-by-step explanation:
Length of edge:
[tex]12[/tex]
Length of apothem:
[tex]\frac{\sqrt{3}}{2}*12[/tex]
[tex]6\sqrt{3}[/tex]
3 × Length of edge × Length of apothem:
[tex]3*12*6\sqrt{3}[/tex]
[tex]216\sqrt{3}[/tex]