## Summary

There are five regular solids in three-dimensional Euclidean space, known as Platonic solids, which have congruent faces that are regular polygons and the same number of faces meeting at each vertex.
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These five solids are the tetrahedron, cube, octahedron, dodecahedron, and icosahedron.
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## Summaries from the best pages on the web

Summary
In geometry , a Platonic solid is a convex , regular polyhedron in three-dimensional Euclidean space . Being a regular polyhedron means that the faces are congruent (identical in shape and size) regular polygons (all angles congruent and all edges congruent), and the same number of faces meet at each vertex.

Platonic solid - Wikipedia
wikipedia.org

Properties of Matter: Solids Crystalline solids. Minerals are crystalline solids. Common table salt is one example of this kind of solid. In... Types of crystalline solids. There are four types…

Properties of Matter: Solids | Live Science
livescience.com

Summary
Platonic solid , any of the five geometric solids whose faces are all identical, regular polygons meeting at the same three-dimensional angles. Also known as the five regular polyhedra, they consist of the tetrahedron (or pyramid), cube , octahedron, dodecahedron, and icosahedron

Platonic solid | mathematics - Encyclopedia Britannica
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The Platonic solids, also called the regular solids or regular polyhedra, are convex polyhedra with equivalent faces composed of congruent convex regular polygons. There are exactly five such solids (Steinhaus…

Platonic Solid -- from Wolfram MathWorld
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Regular polyhedra generalize the notion of regular polygons to three dimensions. They are three-dimensional geometric solids which are defined and classified by their faces, vertices, and edges. A regular polyhedron…

Regular Polyhedra | Brilliant Math & Science Wiki
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A regular polyhedron is identified by its Schläfli symbolof the form {n, m}, where nis the number of sides of each face and mthe number of faces meeting at each…

Regular polyhedron - Wikipedia
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