Plane geometry (disambiguation)

In mathematics, plane geometry refers generally to geometry in a two-dimensional space called a plane.


 * Euclidean plane geometry, is the most common meaning; it includes
 * Plane analytic geometry
 * Plane synthetic geometry
 * Plane projective geometry, the geometry of projective planes
 * Geometry of finite planes, such as the Fano plane
 * Affine geometry of affine planes
 * Geometry of non-Euclidean planes, including
 * hyperbolic planes,
 * elliptic planes
 * two-dimensional spherical geometry.