Which set of intervals is called perfect?
(1 point)
2nd, 3rd, 6th
4th, 5th, octave
3rd, 6th, 7th
2nd, 5th, 7th
The set of intervals called perfect is: 4th, 5th, octave.
The set of intervals that is called perfect is the 4th, 5th, and octave.
The set of intervals that is called perfect is the second option, which includes the 4th, 5th, and octave.
To determine which set of intervals is called perfect, we can refer to the concept of interval quality in music theory. In music, intervals are classified into different qualities, such as major, minor, perfect, augmented, and diminished. Each quality describes specific distances or relationships between two notes.
The perfect intervals are the unison (also known as the unison or octave), fourth, and fifth. These intervals are considered "perfect" because they have a very strong and stable sound. The perfect octave, for example, is the distance between two identical pitches, while the perfect fourth and perfect fifth are commonly found in many harmonies and have a consonant and pleasing quality.
In the provided options, only the second set, which includes the 4th, 5th, and octave, consists of perfect intervals. Therefore, the correct answer is the 4th, 5th, octave set.