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Quintetra Blocks

Quintetra


Picture
photos by Frans de Vreugd

 

Jane Kostick Woodworking
These assemblies are made up of 30 unusually shaped blocks that easily go together to surround a hollow space.

On the outside of the assembly there are five sets of four indented regular tetrahedral spaces, hence the name Quintetra.  In each set, the four tetrahedrons are positioned so that the points closest to the center are the four vertices of a larger regular tetrahedron.

Inside of the triacontahedron box that fits snugly in the middle of the arrangement, there's yet another magnetic assembly (see video below) that surrounds a rhombic dodecahedron.


The angle in each of the 60 external congruent rhombuses is approximately 113.86º.  We have found very many more interesting 3-dimensional shapes that can be made from equilateral triangles and 113.86º parallelograms.  To make them yourself out of paper, feel free to download this pdf file that we presented at the Gathering 4 Gardner conference in Atlanta in 2014:


Picture
Quintetra
click to download a pdf file
 
Quintetra Blocks and Rhombic Triacontahedron
Click on the images to enlarge.
Quintetra Blocks
Tigerwood, Maple, Bubinga, Burmese Blackwood (4" diameter)
Photography by Dean Powell
Click here for more about the geometry.

Making the Quintetra Blocks:

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Picture
Another object that fits snugly inside of the arrangement of 30 Quintetra blocks is one of John's curved wire Six-Axis Stars made of silicon bronze.  Each end of the six beams fits into one of the twelve spaces created where five blocks meet around a point.

To commission one of these unique assemblies, send us an email.

*** To see more photos and videos, visit our Facebook page. ***

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