I think it could be seen as 2 3d cubes.........................................like 1/2...........every dimension up.......is like the dimension below it.......................but twice it...........and sometimes more.........1 d to 2 d..................2d is just 2 1d lines................at right angles to each other.......perpendicular.....

The following images link to interactive models of some of the four-dimensional objects we've studied. To use the interactive versions, your browser must support WebGL, and you must have JavaScript enabled in your browser. Check if your browser has these things ... Orthographic Projection of the Hypercube Corner-First ...