Spiked Icosahedron (Penultimate Unit)

Model September 8, 2004 April 18, 2021
Folding instructions: Penultimate Unit
This is the primary page for this model.
Paper: copy paper (note block)
Type: modular spiky balls (implies: abstract modular, abstract, geometric, mathematical object, modular, multi-sheet, spiky balls)
Author: Michał Kosmulski
Units used: Penultimate Unit, by: Robert Neale
Unit count: 60
Colors: multi-colored
In albums: Modular ② — medium number of units

Images are licensed under the Creative Commons Attribution-NonCommercial 4.0 International License

One way of looking at this model is to see it as an icosahedron with a pyramid placed on each triangular face. Another is seeing it as a dodecahedron where each pentagonal face consists of a 5-unit “fan”. These two ways of looking at the same model correspond to the dodecahedron and icosahedron being duals of each other.

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