Summary: 3rd position augmented triads on the mandolin's higher strings are easy to play with these tips, get expert advice and a music lesson in this free video.
"So, last shape, in the last position we have our G first inversion, and the fifth is up on top of this shape. Here it is right like that. There's your G augmented triad. We're resolving up to the C, which is a really nice motion right there, it's a root position C. You're going to drop the root a whole step to make it dominant. Then you're going to come back to your G, you're going to make this a D chord now. You want to make it a D chord. There's your D and you lower it a whole step, and then you go back to G. So, here's that motion for you. (Audio demo) C, C dominant, G, D, D dominant."
eHow Article: 3rd Position Augmented Triads on the Mandolin's Higher Strings