A minor triad is a three-note chord that consists of a root note, a minor third, and a perfect fifth. For example, in the A minor triad, the notes are A (root), C (minor third), and E (perfect fifth). This chord has a darker, more somber sound compared to a major triad. Minor triads are commonly used in various music genres, including classical, jazz, and pop. They can evoke emotions such as sadness or introspection. Musicians often use minor triads to create tension or contrast within a piece, enhancing the overall emotional impact of the music.