A dim chord
A dim chord for piano with keyboard diagram.
Explanation: The A dim is a three-note chord and you can see the notes marked in red color. The chord can also be written as A°.
Theory: The A dim chord is constructed with a root, a minor thirdAn interval consisting of three semitones and a flattenedThe tone is one half step lower fifthAn interval consisting of six semitones.
Fingerings: Little finger, middle finger, index finger (left hand); thumb, middle finger, ring finger (right hand).
Notes: A - C - Eb