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Sigma KEE - Sphere

球

The class of ThreeDimensionalFigures such that all GeometricPoints that make up the Sphere are equidistant from a single GeometricPoint, known as the center of the Sphere.

Relationships
Parents	三维图	The class of GeometricFigures that have position and an extension along three dimensions, viz. geometric solids like polyhedrons and cylinders.