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 ...

math.rice.edu/~pcmi/sphere/sphere.html

Basic information about spheres. We will start with the basics. A sphere is a set of
points in three dimensional space equidistant from a point called the center of ...

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 ...

threejs.org/docs/

Getting Started. Creating a scene; Detecting WebGL and browser compatibility;
How to run things locally; Drawing Lines; Creating Text; Migration Guide; Code ...

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 ...

en.wikiversity.org/wiki/Ideas_in_Geometry/Spherical_Geometry

Jan 29, 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 ...