A Major — Triads
Three-note stacks of thirds, one per scale degree. The chord-quality pattern below is the Major scale's diatonic harmony.
All 7 triads in sequence
Degree 1 · IA
Degree 2 · iiBm
Degree 3 · iiiC#m
Degree 4 · IVD
Degree 5 · VE
Degree 6 · viF#m
Degree 7 · vii°G# dim