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## Spherical geometry - Wikipedia

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 ...

## Sphere - Math is Fun

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

## The Geometry of the Sphere - Rice University

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 ...

## Spherical Geometry - EscherMath

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

Nov 22, 2015 ... Spherical geometry is nearly as old as Euclidean geometry. In fact, the word geometry means “measurement of the Earth”, and the Earth is ...

## Spherical Geometry -- Math Fun Facts

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 ...

## Circle, Cylinder, Sphere - Paul Bourke

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 ...

## The Sphere | Solid Geometry Review - MATHalino.com

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; ...

## Sphere: Definition & Formulas - Video & Lesson Transcript | Study.com

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

May 23, 2012 ... True for a perfect sphere. However, Earth "bulges" at the equator, which implies that the equatorial radius is a bit longer than the polar radius.

## Sphere Page - Regents Exam Prep Center

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 ...

### The Geometry of the Sphere 1.

math.rice.edu

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 ...

### Spherical Geometry -- from Wolfram MathWorld

mathworld.wolfram.com

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 ...

### Spherical Geometry

jwilson.coe.uga.edu

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