SECTIONING OF CIRCLES

The shape of each interval was found by dividing the circle into: 1/2, 1/3, 1/4, 1/5, 1/6, 1/8 or 1/9 of a circle... Whatever the ratio of the notes were... The geometrical images were used...

Do is a circle or half circle...
Sol a half circle and a triangle...
Fa a triangle and a square...
Mi a pentagon and a square...
Mi Flat a hexagon and a pentagon...
La a pentagon and a triangle...
Re an octagon and a nonogen...
Ti a pentagon and a nonogen...

The harmonic order is on the diagonal...