A sphere is the only geometrical three dimensional figure that does not have any faces. We know that a face is a flat space in which a figure can sit and thus we also know a sphere
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none.
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infinite Take a sphere and make just one directional cuts. Each cut'll leave a face on the surface and you can always make "one more cut". That's just in one direction.
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A sphere has one curved face. A sphere is the set of points that are equidistant from the
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