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 ... The Geometry of the Sphere. John C. Polking · Rice University The material on these pages was the text for part of the Advanced Mathematics ...

paulbourke.net/geometry/circlesphere

A great circle is the intersection a plane and a sphere where the plane also ..... There are a number of 3D geometric construction techniques that require a ...

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 ...

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 ...

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 ...

mathstat.slu.edu/escher/index.php/Spherical_Geometry

Nov 27, 2016 ... Spherical geometry is nearly as old as Euclidean geometry. In fact, the word geometry means “measurement of the Earth”, and the Earth is ...

www.mathalino.com/reviewer/solid-mensuration-solid-geometry/sphere

Every section in the sphere made by a cutting plane is a circle. If the cutting plane passes through the center of the sphere, the section made is a great circle; ...