How do you calculate an object in 4 dimensions? Like the 4 dimensional cube. I understand that a point is the begining of a line and a line is the begining of a plane. From there a plane translates into a 3 dimensional object. A 3 dimensional object translates into a 4 dimensional thing... I am confused at what the fourth dimension represents and what it offers in the field of applied mathematics. So what are some of the uses of the 4th dimension in analysis?