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## Main Question or Discussion Point

A ball can be defined as the inside of a sphere. It is made up of all points inside the sphere. Is there a customary way to describe the location of points in a ball, i.e. a coordinate system to define each point?

Is there a graphics program that can be used that lets you input the coordinates and visualize the defined points graphically?

Is there a graphics program that can be used that lets you input the coordinates and visualize the defined points graphically?