en.wikipedia.org/wiki/Spherical_geometry

Spherical geometry is the geometry of the two-dimensional surface of a sphere. It is an example of a geometry that is not Euclidean. Two practical applications of ...

www.mathsisfun.com/geometry/sphere.html

Sphere. Go to Surface Area or Volume. Sphere Facts. Notice these interesting things: Sphere Radius. It is perfectly symmetrical; All points on the surface are the

math.rice.edu/~pcmi/sphere

Jan 28, 2000 ... This material was the text for part of the Advanced Mathematics course in the High School Teachers Program at the IAS/Park City Mathematics ...

mathworld.wolfram.com/SphericalGeometry.html

The angle between two lines in spherical geometry is the angle between the planes of the corresponding great circles, and a spherical triangle is defined by its ...

jwilson.coe.uga.edu/EMAT6680Fa11/Frailey/SphericalGeometryEssay.htm

Spherical Geometry. Danielle Frailey. Spherical Geometry in History. At the time when Earth was discovered to be round rather than flat, spherical geometry ...

mathworld.wolfram.com/Sphere.html

Twice the radius is called the diameter, and pairs of points on the sphere on opposite .... Coolidge, J. L. A Treatise on the Geometry of the Circle and Sphere.

mathworld.wolfram.com/SphericalTriangle.html

A spherical triangle is a figure formed on the surface of a sphere by three great circular arcs intersecting pairwise in ... "Spherical Geometry and Trigonometry.

www.math.hmc.edu/funfacts/ffiles/20001.2.shtml

Remember high school geometry? The sum of the angles of a planar triangle is always 180 degrees or Pi radians. However, triangles on other surfaces can ...

en.wikiversity.org/wiki/Ideas_in_Geometry/Spherical_Geometry

Apr 22, 2017 ... It is important to recognize and understand these key concepts to fully expand upon properties of spherical geometry. A point: a point on a ...

www.ics.uci.edu/~eppstein/junkyard/sphere.html

The Atomium, structure formed for Expo 1958 in the form of nine spheres, ... The geometry center has information in several places on this problem, the best ...