When its 19 triangles with 11 corners are tetractyses, the 1-tree contains 80 yods. This is the number of Yesod, the penultimate Sephirah of the Tree of Life. When its triangles are Type B, each having four internal corners of triangular sectors, the number of corners of the (19×9=171) sectors = 19×4 + 11 = 87. This is the number of Levanah, the Mundane Chakra of Yesod. The yod population of the 1-tree is the gematria number value of Yesod, whilst the number of corners of triangles in its 16 Type B triangles is the number value of the Mundane Chakra of this Sephirah. It is highly implausible to attribute this pair of properties to chance. Instead, it serves to illustrate the tetractys/geometrical basis of the gematria values of the 10 Sephiroth in the four Worlds of Atziluth, Beriah, Yetzirah & Assiyah.