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Mstari 27:
:<math>\!A =4 \pi r^2</math>
 
==Viungo vya Nje==
*[http://www.mathsisfun.com/geometry/sphere.html Spheres (math is fun)]
*[http://scienceforkids.kidipede.com/math/geometry/sphere.htm Sphere (scienceforkids)]
*[http://www.kidsmathgamesonline.com/facts/geometry/spheres.html Sphere facts (kidsmathgame)]
*[http://study.com/academy/lesson/sphere-definition-formulas-quiz.html Sphere: Definition, Formulas & Quiz]
*[https://www.precisionballs.com/all_wias2.php What is a Sphere? How Are Spheres Made?]
*[[planetmath:186|Sphere (PlanetMath.org website)]]
*{{MathWorld |id=Sphere |title=Sphere}}
*[http://en.wikibooks.org/wiki/Mathematica/Uniform_Spherical_Distribution Mathematica/Uniform Spherical Distribution]
*{{cite video
|title=Outside In
|url=http://video.google.com/videoplay?docid=-6626464599825291409
|date=2007-11-14
|accessdate=2007-11-24}} (computer animation showing how the inside of a sphere can turn outside.)
*[http://www.start2code.com/Cresources/sphere-program-cpp.html Program in C++ to draw a sphere using parametric equation]
*[http://mathschallenge.net/index.php?section=faq&ref=geometry/surface_sphere Surface area of sphere proof.]
 
[[Category:Jiometria]]