If you’ve been following along with our triad lessons, you now know that triads are a powerful way to unlock the guitar fretboard. In this article, we’ll do a quick recap of the six triad shapes we’ve covered so far, show you how to easily turn them into minor triads, and explain why practising them in different keys is so important.
The Six G Major Triad Shapes
We’ve learned six core G major triads so far, spread across the top two string sets. Here’s a breakdown:
On the first string set (strings 1–3):
- Root on top (G) → G–B–D
- Third on top (B) → B–D–G
- Fifth on top (D) → D–G–B
On the second string set (strings 2–4):
- Root on top (G) → G–B–D
- Third on top (B) → B–D–G
- Fifth on top (D) → D–G–B
That gives us six different G major shapes across the fretboard.
Always connect each triad back to its full chord shape (barre chord, open chord, etc.). This helps your memory and makes it easier to apply triads in real playing situations.
Turning Major Triads Into Minor
The good news is, you don’t need to learn an entirely new set of shapes for minor triads. All you have to do is flatten the 3rd.
For example:
- G major = G (1), B (3), D (5)
- G minor = G (1), B♭ (♭3), D (5)
So in practice:
- On any G major triad shape, just move the B down one fret to B♭.
- Now you’ve got the G minor version of that same shape.
This applies across all six shapes. Once you’ve adjusted each inversion, you’ll have 12 total shapes (6 major + 6 minor).
Why You Should Also Learn C Major Triads
Up to now, we’ve worked mainly in G major. But don’t stop there — it’s just as important to practise triads in C major.
Why?
- The top notes change, forcing you to think differently.
- It stops you from relying only on G shapes.
- C is another common key in popular music, making practice directly applicable to songs.
Putting Triads Into Context
Learning triads in isolation is useful, but the real magic happens when you apply them to chord progressions.
Here are some ways to put your triads into practice:
- Try them over Canon in D (a progression we’ll cover in detail in the next article).
- Apply them to common chord progressions like I–IV–V.
- Experiment with your favourite songs, even if they weren’t originally played on guitar. Identify the chords and try to fit triads over the harmony.
This not only strengthens your fretboard knowledge but also helps you develop your own creative voice on the guitar.
Frequently Asked Questions
- Do I need to learn all 12 shapes at once?
No — start with the six major triads in one key (like G). Once you’re comfortable, flatten the 3rds to get the minor shapes, then move to another key.
- Why do the top notes matter?
The top note often functions like a melody note. Thinking this way makes triads more musical and helps avoid clashes with vocals or other instruments.
- Should I memorise shapes or theory first?
Both are important. Learn the shapes by linking them back to bigger chord forms, but also understand the theory (1–3–5 vs. 1–♭3–5) so you can build triads in any key.
Final Thoughts
At this stage, you now know:
Six G major triad shapes
How to turn them into minor triads
How to practise them in multiple keys
How to start applying them to real chord progressions
Mastering triads takes you beyond basic chord strumming and opens the door to a more melodic and flexible approach to rhythm guitar.
Next up, we’ll explore how to practise triads within real chord progressions — starting with the famous Canon in D.
Looking to take your triad knowledge further? I offer personalised guitar lessons in Leeds where we’ll cover fretboard navigation, chord voicings, and how to apply these shapes to real songs. Get in touch to book your first session!