Plane geometry (disambiguation)

Look up plane geometry in Wiktionary, the free dictionary.

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.