The five solids
Tetrahedron, cube, octahedron, dodecahedron and icosahedron are the five convex polyhedra whose faces are congruent regular polygons with the same number meeting at each vertex.
Plato’s associations
In Plato’s Timaeus, four solids are linked with classical elements and the dodecahedron with the ordering of the cosmos. Later writers expanded these correspondences in many directions.
Modern sacred geometry
Contemporary systems may associate solids with energy centers, meditation or metaphysical qualities. Those uses belong to spiritual practice; they should not be presented as consequences of Euclidean geometry.
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