19 November

One Platonic solid a day, for a week. (There are 5.) To be a Platonic solid all of the faces must be the same size and shape, all angles and sides have to be equal, and each vertex has to have the same number of faces meeting at it. Tetrahedron first. All triangles. Three of the Platonic solids are all triangles, in the real world of engineering they’re the most structurally sound of all structures, because the triangle is both the simplest and strongest shape.