Decahedron 12 Faced
Icosahedron 12 Points

Decahedron 20 Points
Icosahedron 20 Faced

music theory 12 chromatic incorporated into 20 part divisions.

20÷12=1.666666666

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Duality: The dodecahedron (12 faces) and icosahedron (20 faces) are duals; taking the centers of the 12 pentagonal faces of a dodecahedron forms an icosahedron, and vice-versa. Both share 30 edges. The coordinates of these solids are deeply tied to the golden ratio.

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