3dimentional figures are solid figures.
Figures are not solid.
Surface, edge, and vertex are the different parts of solid figures.
sides of the solid figure
Faces on solid figures are like when you look at a square you see a flat wall type surface.
All solid figures have length, width and height and, conversely, if a figure has length, width and height then it is a solid figure.
Because they are both 3 dimensional
idenfy the FF.