the sphere in 3 dimensional space is only 2 dimensional because "it is missing a dimension" : the height above the sphere.
http://www.dimensions-math.org/Dim_CH3_E.htm
三維球面「缺少了一個維度」：離球面之高度。故它只是二維的
Sunday, March 17, 2013
the sphere in 3 dimensional space is only 2 dimensional because "it is missing a dimension" : the height above the sphere.
http://www.dimensions-math.org/Dim_CH3_E.htm
三維球面「缺少了一個維度」：離球面之高度。故它只是二維的
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