In any key there are 7 main chords - chords 1 through 7. With these chords you can play any song in any key.
Here are the finger shapes for 7 chords in the Key of G on the guitar. The same guitar chord shapes apply to all keys. If you learn these 7 shapes you will be able to play any song in any key.. (and its really only 5 chord shapes!) This was by far the best guitar lesson I ever got. I'm so thrilled to pass it on.
On Piano things are not as easy as guitar this shapes change due to the piano key layout
First thing to show is how chords a built
How to build a Major chord on a piano
How to build a Minor chord on a piano
How to build a Diminished chord on a piano
In any key there are 7 main chords - chords 1 thru 7 with these chords you can play any song.
Here are the finger shapes for 7 chords in the Key of C