Linked from
The 19 pages that link to Polyhedron, each with the reason it gives.
PolygonNarrower topic: Polyhedra extend polygonal boundaries into three-dimensional geometry.
DiceNarrower topic: Most dice are polyhedra, with each face serving as a possible outcome.
Platonic solidNarrower topic: Platonic solids form a precisely defined family of polyhedra.
TetrahedronNarrower topic: A tetrahedron is the polyhedron with the fewest possible faces.
DiagonalNarrower topic: Polyhedra also have diagonals, joining vertices that do not share an edge.