MTBR; circle of triads (24-gon in 7 octaves) MTBR; circle of diminished triads (4-gon in 1 octave)
MTBR; circle of short inverted triads (6-gon in 2 octaves) MTBR; circle of long inverted triads (8-gon in 3 octaves) MTBR; circle of inverted diminished triads (8-gon in 3 octaves)
MTBR; scale circle in thirds (7-gon in 2 octaves)
MTBR; scale circle of inverted triads (14-gon in 5 octaves)
This category has the following 3 subcategories, out of 3 total.