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en.wikipedia.org/wiki/Spherical_geometry

www.mathsisfun.com/geometry/sphere.html

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

Basic information about

mathworld.wolfram.com/SphericalGeometry.html

The angle between two lines in

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

Remember high school

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

This lesson will give a mathematical definition of a

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

Every section in the

paulbourke.net/geometry/circlesphere/

A great circle is the intersection a plane and a

www.kidsmathgamesonline.com/facts/geometry/spheres.html

Fun

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

Note: A cross section of a

More Info

math.rice.edu

Jan 28, 2000

jwilson.coe.uga.edu

www.ics.uci.edu

The Atomium, structure formed for Expo 1958 in the form of nine