Open shape
x03221
Aaug is the A augmented chord. Its notes are A, C♯ and E♯. The raised fifth adds tension. Use it briefly between more settled chords.
x03221
Numbers show frets from the low E string to the high e string; x means don't play that string.
Every A, C♯ and E♯ on the first 12 frets. The filled dots are the root, A. Build your own shape from any nearby group.
Other A chords
Other augmented chords