Respuesta:
El área del icosaedro es 5 · [tex]\sqrt{3}[/tex] · a²
5 · [tex]\sqrt{3}[/tex] · 3² = 77.9422863406 cm²
V= 5/12 (3 + [tex]\sqrt{5}[/tex]) a³
5/12 (3+[tex]\sqrt{5}[/tex]) 3³ = 58.9057647469 cm³
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Respuesta:
El área del icosaedro es 5 · [tex]\sqrt{3}[/tex] · a²
5 · [tex]\sqrt{3}[/tex] · 3² = 77.9422863406 cm²
V= 5/12 (3 + [tex]\sqrt{5}[/tex]) a³
5/12 (3+[tex]\sqrt{5}[/tex]) 3³ = 58.9057647469 cm³