Bola (geometri): Perbedaan antara revisi

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|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.)
|archive-date=2007-09-01
|archive-url=https://web.archive.org/web/20070901111142/http://video.google.com/videoplay?docid=-6626464599825291409
|dead-url=yes
}} (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.]