A regular convex solid is a three-dimensional object that has a uniform shape, where all the faces are congruent regular polygons. Some synonyms for this term include regular polyhedron, Platonic solid, or Platonic body. Platonic solids are named after the ancient Greek philosopher Plato, who believed that these shapes were essential building blocks of the universe. There are five Platonic solids, which include the tetrahedron, cube, octahedron, dodecahedron, and icosahedron. These particular shapes have been studied extensively in mathematics and physics, as they exhibit unique characteristics and symmetries that are essential to understanding the properties of three-dimensional objects.