13a. Snub dodecahedron 12/5 80/3 – truncation of dodecahedron 12/5

The distance from the dodecahedron to the centre of the pentagon is EP×1.11.The distance from the centre of the snub

dodecahedron to the centre of the pentagon (red) is EA×1.98. These two distances are equal, thus EA=EP×0.56

See Badoureau for application of the pentagons (red) and truncation resulting in eighty tiangles (blue-green)

However 60 of the 80 triangles are scalene triangles. Thus, this snub dodecahedron is not a correct Archimedean

polyhedron.

Line 1: Application of snub dodecahedron pentagon (red) on dodecahedron pentagon acc. to Badoureau.

Line 2: Snub cube, net and solid. (correct Archimedean)

13b. [Snub dodecahedron - truncated from icosahedron: Center of icosahedron to center of triangle: 0.76 EP

Center of snub dodecahedron to center of the triangle: 2.08 EA. EA = 0.36 EP ]