# Polyhedron

By [Crypto exchanges](https://paragraph.com/@crypto-exchanges) · 2023-06-09

---

In geometry, a polyhedron (plural polyhedra or polyhedrons; from Greek πολύ (poly-) 'many', and εδρον (-hedron) 'base, seat') is a three-dimensional shape with flat polygonal faces, straight edges and sharp corners or vertices.

A convex polyhedron is the convex hull of finitely many points, not all on the same plane. Cubes and pyramids are examples of convex polyhedra.

A polyhedron is a 3-dimensional example of a polytope, a more general concept in any number of dimensions.

---

*Originally published on [Crypto exchanges](https://paragraph.com/@crypto-exchanges/polyhedron)*