The World of Triangles

“Fire, air, earth, and water are bodies and therefore solids, and solids are contained in planes, and plane rectilinear figures are made up of triangles.”
― Plato, Timaeus

The Platonic Solids

The Platonic Solids belong to the group of geometric figures called polyhedra.

polyhedron is a solid bounded by plane polygons. The polygons are called faces; they intersect in edges, the points where three or more edges intersect are called vertices.

regular polyhedron is one whose faces are identical regular polygons. Only five regular solids are possible

cube  tetrahedron  octahedron   icosahedron  dodecahedron

These have come to be known as the Platonic Solids

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