Concave Sides on an Icosahedron

Last week's interest: an icosa with concave sides.

Icosahedron Studies

In working on icosahedron studies lately I've found better methods to make measurements come out more exact, which with these is very important.

I've developed a small table-sized model in both inches, and metric.

And then I scaled one up to human scale for, say small outdoor greenhouse use.

The last version is an extrusion along the pentagonal faces in two different diameter tubes.

Deliberate Wandering

I tried to imagine a quarter of a sphere limited within the space of a cube.

I now imagine encircling a dodecahedron with undulating tubing.