We give a mathematical model of chords and use it to talk about musical symmetry.

# Tag: Symmetry

## A rose by any other name…

We describe the symmetries of the English alphabet.

## Da Vinci’s Theorem.

We show that the set of symmetries of any polygon is isomorphic to the set of symmetries of a regular polygon. This is a result attributed to Leonardo da Vinci.

## Symmetric group of an equilateral triangle.

We show that the set of symmetries of an equilateral triangles forms a group under composition.

## Symmetry of regular polygons

We determine how regular polygons are symmetrical.