• 1 · Religion and Magic
• 2 · Nature
• 3 · Human Being, Man in General
• 4 · Society, Civilization, Culture
• 5 · Abstract Ideas and Concepts
• 6 · History
• 7 · Bible
• 8 · Literature
• 9 · Classical Mythology and Ancient History

• Top
• 4 · Society, Civilization, Culture
• 49 · education, science and learning
• 49D · mathematics
• 49D4 · stereometry, solid geometry

49D45 · regular polyhedron

• 49D451 · tetrahedron
• 49D452 · hexahedron, cube
• 49D453 · octahedron
• 49D454 · dodecahedron
• 49D455 · icosahedron
• 49D456 · other polyhedrons