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Regular tetrahedron (tetrahedra) is a three-dimensional body, whose surface is made up of four identical equilateral triangles, and has four vertices. Regular tetrahedron belongs among the regular triangular pyramids. Interestingly, the distance of every two vertices of the tetrahedron is the same, unlike other Platonic solids. According to Plato, tetrahedra is a symbol of fire.
Faces of dodecahedron are shaped from the same regular pentagons. Plato assigned this body to the universe all around us (existence).
The regular icosahedron is a body whose walls consist of twelve identical equilateral triangles. Icosahedron has 12 vertices and 30 edges. According to Plato, it was a symbol of water.
