01. Formiga
(Fuvest-SP)
Uma formiga resolveu andar de um vértice a outro do prisma reto de bases triangulares ABC e DEG, seguindo um trajeto especial. Ela partiu do vértice G, percorreu toda a aresta perpendicular à base ABC, para em seguida caminhar toda a diagonal da face ADGC e, finalmente, completou seu passeio percorrendo a aresta reversa a CG. A formiga chegou ao vértice:[br][br][img]https://kuadro-static.storage.googleapis.com/a2b31dcdbdf3444bba50190f171f1f3e[/img][br][br][br]
01. Sólido gerado pela rotação de um quadrado
Calcule, em cm³, o volume do sólido de revolução gerado pela rotação completa de um quadrado de lado 4 cm em torno de um de seus lados.
01. Luminária em forma de tetraedro truncado
Luminária em forma de tetraedro truncado
(ENEM) As luminárias para um laboratório de matemática serão fabricadas em forma de sólidos geométricos. Uma delas terá a forma de um tetraedro truncado. Esse sólido é gerado a partir de secções paralelas a cada uma das faces de um tetraedro regular. Para essa luminária, as secções serão feitas de maneira que, em cada corte, um terço das arestas seccionadas serão removidas. Uma dessas secções está indicada na figura.[br][img 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[/img][br]Essa luminária terá por faces