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Music Theory

Identify Triads in Second Inversion

In second inversion, the fifth of the chord is in the bass. It is the inversion that sounds least stable and the hardest one to recognize by sight, because on the staff you see a fourth at the bottom and a third at the top.

1. What it looks like on the staff

TypeRoot positionSecond inversion (fifth in the bass)
MajorC – E – GG – C – E
MinorD – F – AA – D – F
DiminishedB – D – FF – B – D
AugmentedC – E – G♯G♯ – C – E

2. How to analyze it

Tip: When the chord is written in close position, the middle note is the root. The bass is the fifth and the top note is the third. Rebuild the chord upward from that root to recognize its type.

3. Interactive exercise

All the chords are in second inversion: the fifth is in the bass. Your task is to identify the type of triad.

Next exercise: identify triads in all three positions. To practice the opposite skill, build triads in second inversion.

If you practice these chords on an instrument, the online metronome helps you build speed gradually: start slowly (50-60 BPM) and speed up a little at a time. The online tuner lets you check that every note of the chord is in tune.

For the full theory of each triad, see the page on triads, with the diminished chord and the augmented chord.

Printable worksheet (PDF)

The same exercise on paper, for class: 21 triads in second inversion on one side of A4, and under each one you write its type. With a separate answer sheet.

It goes from easier to harder: first chords with natural notes in treble clef, then with sharps and flats and the bass clef coming in gradually, and finally a few with a double accidental.

Printable PDF worksheet with 21 triads in second inversion to analyze
A4 sheet with 21 triads in second inversion to analyze.

Download the worksheet (PDF, A4) Answers

You may print and photocopy it freely for the classroom. To practice in the other direction, see the worksheet to write triads in second inversion.

Frequently Asked Questions

What is the second inversion of a triad?
In second inversion the fifth of the chord is in the bass. For example, in C major in second inversion the bass is G, and the upper notes are C and E. The chord is still C major (C–E–G), but with the fifth in the lowest voice.
How do you recognize a second inversion on the staff?
In second inversion the interval from the bass to the middle note is a fourth, and from the bass to the top note it is a sixth. This combination of a 4th and a 6th (written 6/4 in figured bass) is the visual signature of a second inversion.
Why does the second inversion sound especially unstable?
Because the fourth above the bass is treated as a dissonance in traditional harmony. For this reason a second-inversion chord usually asks to be resolved. The cadential 6/4 chord (on the fifth degree of the bass) is one of the most common devices before a cadence.
What is the cadential six-four chord?
It is the tonic triad in second inversion, with the dominant note in the bass. In C major it is C–E–G with G in the bass, followed by the G major chord in root position. It creates tension just before the final resolution and is very common in classical-style cadences.
How can I practice recognizing the three positions?
Learn to read the intervals above the bass. A 3rd and a 5th: root position. A 3rd and a 6th: first inversion. A 4th and a 6th: second inversion. Practice with each type of triad until the identification is automatic.