# Folding Dürer's Partial Net

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A bilunabirotunda, named by Norman Johnson [1], is a convex polyhedron with regular faces that is not uniform (i.e. not a Platonic or Archimedean solid, prism or antiprism). This Demonstration shows the folding of a bilunabirotunda's net. The net is a generalization of Dürer's partial net. In the graphic, the viewpoint zooms in as the figure closes.

Contributed by: Izidor Hafner (January 2019)

Open content licensed under CC BY-NC-SA

## Details

The image of Dürer's partial net was taken from [2, p. 38], where two other interpretations of it are also given.

References

[1] Wikipedia. "Bilunabirotunda." (Jan 18, 2019) en.wikipedia.org/wiki/Bilunabirotunda.

[2] M. Friedman, *A History of Folding in Mathematics: Mathematizing the Margins*, New York: Springer Berlin Heidelberg, 2018.

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