👉 Polyhedra are three-dimensional geometric figures with six faces, including both flat and curved surfaces. They can be classified into two main types: convex and concave. A convex polyhedron is a shape that has all its vertices in the same plane, while a concave polyhedron has at least one vertex on the opposite side of the plane from another vertex. Polyhedra are used in various fields such as architecture, engineering, and computer graphics.
