Linked from
The 18 pages that link to Plane (geometry), each with the reason it gives.
AreaNarrower topic: Area is one of the central measurements assigned to plane figures.
PolygonNarrower topic: Polygons lie in a plane rather than in three-dimensional space.
Line (geometry)Narrower topic: A Euclidean line can lie within a plane.
Dihedral angleNarrower topic: Each side of a dihedral angle is a plane.
Strike and dipNarrower topic: Strike and dip describe the orientation of a geological plane.
Cross-sectional areaNarrower topic: A cross section lies in a plane through the object.
CoplanarityNarrower topic: Coplanarity asks whether several objects fit within one such surface.