- chris cambré
In geometry, a Schlegel diagram is a projection of a polytope through a point beyond one of its facets or faces. The diagram is named for Victor Schlegel, who in 1886 introduced this tool for studying combinatorial and topological properties of polytopes. In dimension 3, a Schlegel diagram is a projection of a polyhedron into a plane figure. By doing so we can display a solid as a planar graph. In the following worksheets of this chapter you can see the projections of the Platonic Solids to construct its Schlegel diagrams.