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A 3x3x3 truncated on twelve edges and afterwards extended. The result resembles the hexagonal dipyramid.
This puzzle is part of the series "Sharp Edges". All these modifications have in common that the edges are not truncated regularly but one side a bit deeper than the other. One prominent member of this series is the truncated-only dodecahedron 3x3x3 which was truncated on twelve different edges.
Its technical signature (A01540AA0140) indicates where to cut the original cube and that there are 12 cuts to be made.
After truncating the remaining faces receive extensions to "delete" these obsolete faces.
At first glance the resulting solid looks like a hexagonal dipyramid but the triangle are not truly isosceles.
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