Transformed by the 2nd-order tetractys, the simplest geometrical shape — the triangle — embodies the very number of yods needed to divide the seven enfolded polygons of the inner Tree of Life into their sectors. It is the seed that grows and flowers into the complete form of the inner Tree of Life. The number 216 of Geburah is the number of yods lining the 88 sides of the 47 tetractyses making up a set of seven enfolded polygons that are intrinsic to this set. As the four yods in the root edge are shared between both sets of polygons, there are (216−2=214) boundary yods associated with each set of polygons enfolded in successive Trees of Life. This is the number of yods in the outer form of the Tree of Life when its 16 triangles are Type A: