15
Fig. 1 · F5 on the keyboard

piano chord

F5

F1C5

Root and fifth, no third at all — neither major nor minor, which is the point.

on guitaron ukulelethe scale

What is true of it

F5 is F and C — 1 and 5 counted from F.

F in other shapes

FmajorFmminorFdimdiminished

C5C♯5D♭5D5D♯5E♭5E5F♯5all 374