Get ready! This post is all about building major triads. Building major triads is surprisingly easy if you already know how to build a major scale. (If you don’t, you can learn how to build a major scale here. ) You can build a major triad in 3 easy steps:
1) Build your major scale for the corresponding key. This means that if you want to build a C major triad, you will start with building a C major scale.
2) Take the TONIC, MEDIANT, and DOMINANT notes… slap them together… aaaannnnnnd…..
Below is a set of major triads that start on each of the white keys.