All the chords built on other notes in the scale of C are minor, except chord VII - the notes B – D – F, which is diminished. When a seventh is added to a chord this is known as a seventh chord.

The best feature of Ideal Piano is that it uses algorithm based on music theory to determine what chord types you are currently playing and displays it on the screen. This algorithm comes from my ...

The distance FM is half of the length of the chord. (The perpendicular from the centre of a circle to a chord bisects the chord.) In the diagram below, AB is the chord of a circle with centre O.