90 Part: Holden Icosahedral Polysurface
You will need 30 connectors and 60 pentagonal tiles to make this math manipulative.
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January 22, 2026
Description
PDFThis is a 90 part modular construction toy of a Holden icosahedral polysurface.
You will need 30 connectors and 60 pentagonal tilz. recommended z-axis setting 3mm.
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Model origin
The author marked this model as their own original creation.