Three tones or halftones {triad, music} can have thirds between them.
types
Minor third can follow major third {major triad}, so triad can have fundamental, major third, and perfect fifth tones. Major third can follow minor third {minor triad}, so triad can have fundamental, minor third, and perfect fifth tones. These two triads are the most-consonant chords.
Major third can follow major third {augmented triad}. Minor third can follow minor third {diminished triad}.
dominance
Triad can use the fundamental as dominant tone {dominant triad}. Triad can use tonic as fundamental tone {tonic triad} {tonic chord}. Triad can use fundamental as subdominant tone {subdominant triad}. Triad lowest tone can be not the fundamental {inverted triad}.
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Date Modified: 2022.0224