C major and the different forms of A minor, have a relationship existing between them. C major is known as the relative major of A minor and A minor is known as the relative minor of C major.The examples are using this key relationship to minimize confusion. Once you understand the relationships in these relationships, the other relationships in music become easier.
The diminished triads indicated on the last page, were using the notes B, D, F for Bdim. F#, A, C for F# dim. G#, B, D for G# dim.
This time the scales will be given again and then the diminished triads to follow in the diagrams.C major will be extended lower to the notes B and A
The notes B, D, F form the B dim triad and are found in the C major and A natural minor scales. The notes G#, B, D form the G# dim triad and are found in the melodic and harmonic minor scales. The notes F#, A, C are found in the melodic minor scale. Play each arpeggio (broken chord) and compare against the sounds of the scales mentioned.The last diagram will be the melodic scale extended another octave higher ascending only.