This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Guitar triads. Triad chords for sixstring guitars Image created and released into the Public Domain by Geoff Martin Attribution is discouraged en Bbcxv en music Geoff Martin original upload log page en Guitartriads Bbcxv bytes no chords for sixstring guitars PD Image created and released into the Public Domain by Geoff