Area and Volume of n-Dimensional Spheres
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This Demonstration lets you calculate or see the general formulas of the surface area and volume of an -dimensional sphere.
Contributed by: Jon Kongsvold (September 2007)
Open content licensed under CC BY-NC-SA
2D 'spheres' are circles and have circumference and area; spheres of dimensions greater than 3 have content for the hypersurface and hypervolume. The skin of a 4D sphere has volume.