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An icosahedron is a polyhedron with 20 faces, which can be regular, stellated, or compound. Learn about its properties, symmetries, constructions, and applications in geometry, physics, and art.
Learn about the icosahedron, a three-dimensional shape with 20 equilateral triangular faces, 30 edges, and 12 vertices. Find out its volume, surface area, and truncated formulas, and see solved examples with answers.
Learn about the regular icosahedron, a convex polyhedron with 20 triangular faces, 30 edges, and 12 vertices. Find out how to construct it, its properties, symmetry, and applications in nature and mathematics.
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4 days ago · An icosahedron is a 20-faced polyhedron with various types and symmetries. Learn about the regular icosahedron, the Platonic solid with equilateral triangle faces, and other examples of icosahedra from MathWorld.
Learn about the icosahedron, a 20-sided polyhedron with equilateral triangles as faces. Find out its volume, surface area, and how it relates to dice, viruses, and soccer balls.
Learn what an icosahedron is, a polyhedron with 20 faces, and how to calculate its surface area and volume. Find out the properties of a regular icosahedron, one of the five Platonic solids, and see examples of other types of icosahedra.
4 days ago · The regular icosahedron, often simply called "the" icosahedron, is the regular polyhedron and Platonic solid illustrated above having 12 polyhedron vertices, 30 polyhedron edges, and 20 equivalent equilateral triangle faces, 20{3}.