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/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.

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 ...

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 ...

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; ...

study.com/academy/lesson/sphere-definition-formulas-quiz.html

This lesson will give a mathematical definition of a sphere, discuss the formulas...
... 27 - Analytic Geometry & Conic Sections in Trigonometry:... Go to Analytic ...

www.khanacademy.org/math/geometry/hs-geo-solids/hs-geo-solids-intro/v/volume-of-a-sphere

The formula for the volume of a sphere is V = 4/3 πr³. See the formula used in an
example where we are given the diameter of the sphere.

www.regentsprep.org/regents/math/geometry/gg2/SpherePage.htm

Note: A cross section of a geometric solid is the intersection of a plane and the
solid. The surface area of a sphere is four times the area of the largest ...