____ minus the interval number equals the inverted interval number.
9 minus the interval number equals the inverted interval number.
I.E. 9 minus a 6th chord equals a 3rd. 9 minus a 5th chord equals a 4th chord.
Perfect intervals invert to ___ intervals.
Perfect intervals invert to perfect intervals.
All other intervals besides a perfect fourth or fourth invert to an interval with the ___ quality.
All other intervals besides a perfect fourth or fourth invert to an interval with the opposite quality.
I.e. A major sixth inverts to a minor third. An augmented 6th inverts to a diminished 3rd.