A Platonic solid is a kind of polyhedron (a three-dimensional shape). It has the following traits:

• Each of their faces is built from the same type of polygons.
• All the edges are the same, and all of them join two faces at the same angle.
• There are the same polygons meeting at every corner of the shape.
• The shape is convex, meaning the faces do not go through each other (intersecting), or span the same range (coplanar).