Think of the human face. You only need to know what half of it looks like in order to build the image of the whole face because one half is the mirror image of the other — or at least approximately so. What is essentially needed to express the whole is really within it as another whole. This is characteristic of holistic geometrical systems like those discussed in this website. Holistic systems are always compounded from other holistic systems: the part contains the whole.

The "inner form" of the Tree of Life consists of two similar sets of seven regular polygons:

triangle-square-pentagon-hexagon-octagon-decagon-dodecagon

Each one is the mirror image of its counterpart in the other set. The seven polygons are enfolded in one another. Their shared side is the 'root edge', so-called because the polygons should be thought of as growing out of it in the order: triangle→dodecagon, just as a plant or tree develops after its seed has taken root in the soil.