A minor triad is a chord with three notes *x,y,z* such that
*y* is 3 semitones higher than *x* and *z* is 4 semitones higher than *y*.

Alternatively, treating notes as integers, *(x,y,z)* is a minor triad iff *(x,y,z)=(x,x+3,x+7)*.

Note that a minor triad is composed of the first, the third, and the fifth sounds from a natural minor scale.

Check out our definition of major triads also explained on a virtual piano.