This is a nest containing the five regular polyhedra, also known as the Platonic Solids: The Icosahedron in blue, the Dodecahedron in dark blue-purple, the Hexahedron in green, the Tetrahedron/Star-tetrahedron in red, and the Octahedron in yellow. This model follows Euclid's Elements of Geomtery, Book XIII, which provides the ratios and the geometric construtions to find the sizes for each of the shapes.
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