On the piano, a dominant triad can be played by using the following fingering:
* Root: Right hand, thumb
* Third: Right hand, middle finger
* Fifth: Right hand, pinky finger
For example, the dominant triad in the key of C major is C - E - G. To play this triad on the piano, you would use your right thumb to play the C note, your right middle finger to play the E note, and your right pinky finger to play the G note.
Dominant triads are often used in jazz and blues music, where they are used to create a sense of tension and urgency. They can also be used in classical music to create a sense of drama or excitement.