Trigons to Triads

Title: Trigons to Triads: A Play on Chords
Author: Troy (Donald Hammond)
Year: 119E
Subject: An exploration of triangles; Pythagorean triples; and their innate dozenal properties in relation to musical chords.
http://www.dozenal.org/drupal/sites_bck/default/files/DSA_troy_trigons_dialer.pdf
"Troy" (Donald Hammond, of the DSGB) writes a fascinating little article about triangles; Pythagorean triples; and how they relate to chords, and provides a wonderful little printable "chord dialer" that uses the innate properties of the dozen to identify harmonious chords for music.