## What is supplementary set?

Supplementary angles are pairs angles such that the sum of their angles is equal to 180 degrees. Although the angle measurement of straight is equal to 180 degrees, a straight angle can’t be called a supplementary angle because the angle only appears in a single form.

## How many Trichords are there?

A trichord is a contiguous three-note set from a musical scale or a twelve-tone row. In musical set theory there are twelve trichords given inversional equivalency, and, without inversional equivalency, nineteen trichords.

## What is a diatonic set?

OVERVIEW Serial composition, a development of the twentieth century, evolved from the use of ideas about the mathematics of sets in musical construction. Diatonic Sets A set is a collection of like objects, a class of elements. The set can be made up of pitches as easily as any other kind of object.

## How many set classes are there with a cardinality of three?

In all there are 208 distinct set classes of cardinalities 3 to 9….

cardinality name number of distinct set classes
3 trichord 12
4 tetrachord 29 (including one Z-related pair)
5 pentachord 38 (including three Z-related pairs)

## What are the 2 types of diatonic scales?

Two diatonic scales – C-major and G-major – in the same orbit under translation differ only in one single tone by a minimal distance, the chromatic alteration of the tone F to F .

## Why is it called diatonic?

The word “diatonic” comes from the Greek word diatonikós (διατονικός), which essentially means “through tones”, from diatonos (διάτονος), “stretched to the uttermost”, probably referring to the tension of the strings of musical instruments.

## What is the first tetrachord called?

The first tetrachord to define is what we’ll call the major tetrachord. It is the first four notes of the traditional major scale – two whole steps and a half-step. The name comes from tetra (from Greek—”four of something”) and chord (from Greek chordon—”string” or “note”).

## How many trichords are there in a musical set?

In musical set theory there are twelve trichords given inversional equivalency, and, without inversonal equivalency, nineteen trichords. These are numbered 1-12, with symmetrical trichords being unlettered and with uninverted and inverted nonsymmetrical trichords lettered A or B, respectively.

## What are the possible trichords on the C scale?

The possible trichords on C would then be: Several of these pitch sets interlocking could form a larger set such as a pentatonic scale (such as C -D- F -G-B ♭ – C’ ).

## Which is the correct definition of a trichord?

Trichord. In music theory, a trichord is a group of three different pitch classes found within a larger group ( Friedmann 1990, 42). A trichord is a contiguous three-note set from a musical scale ( Houlahan and Tacka 2008, 54) or a twelve- tone row .

## How many subsets are in the set C?

Answer: There are 16 subsets of the set C = {1, 2, 3, 4}. In example 6, set R has three (3) elements and eight (8) subsets. In example 7, set C has four (4) elements and 16 subsets.