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Summary Of: Spherical geometry

Spherical geometry is the simplest model of...

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On a sphere, the sum of the angles of a triangle is not equal to 180°. A sphere is not a Euclidean space, but locally the laws of the Euclidean geometry are good approximations. In a small triangle on the face of the earth, the sum of the angles is very nearly 180°. The surface of a sphere can be represented by a collection of two dimensional maps. Therefore it is a two dimensional manifold. | | manifold | geometry | dimensional | sphere | non-Euclidean geometry | navigation | astronomy | plane geometry | points | line | geodesic | great circles | angles | spherical trigonometry | trigonometry | elliptic geometry | hyperbolic geometry | real projective plane | antipodes | non-orientable | Spherical distance | Spherical polyhedron | Spherical trigonometry | SIGI | UNCC | Rice University | Eric W. Weisstein | MathWorld | | geometry-related | stub | help | Categories | Classical geometry | Spherical trigonometry | Spherical astronomy | Geometry stubs |
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Spherical geometry".