Ch. 9 Diatonic Triads and 7th Chords
Triads: 4 Types
1.
2.
3.
4.
Major Triad
Minor triad
Diminished Triad
Augmented Triad
Major Scale Triads
Ex. (C
Major)
Root of
Chords
C
D
E
F
G
A
B
Scale
Degree
I
ii
iii
IV
V
vi
vii
Triad Type
Major
Minor
Minor
Major
Major
Minor
Diminished
Pop
Symbol
C
Dmin
Emin
F
G
Amin
B•
7th Chords: 5 Types
1. Maj7
2. Min7
3. 7
(Dominant 7)
4. Min7 b5 or half diminished 7
5. •7
Major Scale 7th Chords
C Major
Scale
C
D
E
F
G
A
B
Scale
Degree
I
ii
iii
IV
V
vi
vii
Triad Type
Major
Minor
Minor
Major
Major
Minor
•
7th Chord
Type
Major 7th
Minor 7th
Minor 7th
Major 7th
Dmin7
Emin7
FMaj7
Pop
CMaj7
Symbol
7th Chords
G7
7 Minor 7th
Minor 7 b5
Amin7
Bmin7b5
Minor Scale (Harmonic Minor) Triads
C minor
C
D
Eb
F
*G
Ab
*B
Scale
Degree
i
ii
III
iv
*V
VI
*vii
Triad Type
Minor
•
Major
Minor
Major
Major
•
Pop
Symbols
Cmin
D•
Eb
Fmin
G
Ab
B•
Minor Scale (Harmonic Minor) 7th Chords
C minor
C
D
Eb
F
*G
Ab
*B
Scale
Degree
i
ii
III
iv
*V
VI
*vii
Triad Type
Min
•
Maj
Min
Maj
Maj
•
7th Chord
Type
Min7
Min7b5
Maj7
Min7
7 Maj7
*7
Dmin7b5
EbMaj7
Fmin7
Pop
Cmin7
Symbols
7th Chords
G7
AbMaj7
B*7
Identifying diatonic triads and 7th chords in a given key:
Example of a chord progression
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