Let us first define what Approximate symmetry means.
Approximate Symmetry is a form of balance achieved by the use of similarly balanced (not identical) compositional units on either side of a vertical axis within the picture plane.
The units does not have to be completely identical independently but viewed together, they must show semblance to a balanced artwork.
Assemblage is the bonding of shapes or objects, using glue, pasting, nailing, soldering, and more. Assemblage is basically a three dimensional collage. Assemblage is most common in modern art.
Freeform shapes can be closed or open, and have no defined name or qualities. Geometric shapes are close shapes, with a specific name and distinct qualities.
