Description

Platonic Ortho — the five regular solids, drawn in ink.

There are only five perfectly regular polyhedra in three-dimensional space: every face the same polygon, every edge the same length. Plato linked them to the elements; later writers called that family sacred geometry.

This sheet stacks all five in a column, each inside a circle. The view is orthographic, so the wireframe reads as proportion rather than perspective.

Tetrahedron (red) — four triangles, fire. Cube (red) — six squares, earth. Octahedron (yellow) — eight triangles, air, dual of the cube. Icosahedron (green) — twenty triangles, water. Dodecahedron (blue) — twelve pentagons, the cosmos; the pentagon carries the golden ratio.

Cube and octahedron swap faces for vertices; dodecahedron and icosahedron do the same; the tetrahedron is dual to itself. Each solid is scaled to the same outer circle so you compare silhouette, not size. One of one.