For the purpose of studying sacred geometry, there are two ways of transforming
their triangles:
1. change them into tetractyses ('1storder tetractyses'), '2ndorder tetractyses,' in which each
yod itself becomes a tetractys, and so on;
2. divide the triangle into its sectors, those sectors into three more sectors, etc and then turn
each sector into a tetractys. Triangles whose sectors are tetractyses are called 'type A triangles'
and triangles whose sectors are divided into three tetractyses are called 'type B triangles,' The
numbers in red denote the yod populations of the various, transformed triangles.
Usually, the tetractys has the form of an equilateral triangle. In the context of sacred geometry,
however, it may be an isosceles triangle or, indeed, a triangle of any shape, that is turned into a
tetractys.
