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A regular tetrahedron is a three-dimensional shape with a surface composed of four identical equilateral triangles and four vertices. It is classified as a regular triangular pyramid. Interestingly, the distance between any two vertices of a regular tetrahedron is the same, unlike other Platonic solids. According to Plato, the tetrahedron symbolizes fire. The faces of a dodecahedron are composed of regular pentagons. Plato associated the dodecahedron with the universe and existence as a whole. The regular icosahedron is a polyhedron with 20 faces, each consisting of an equilateral triangle. It has 12 vertices and 30 edges. Plato associated the icosahedron with water.
