As we already know (if you have read our article on scales) C major uses all of the white notes that we see on our keyboard.

The shapes, both major and minor ... t try to play every note in a scale simultaneously, so why not apply this attitude to the CAGED chord shapes and strip the C, G and D chords down to single ...

Chords are numbered in Roman numerals. For example, in the scale of C major, the chords are numbered like this: An added 6th is a major triad with the addition of a 6th note above the root.