pentagonal

Continental Drift is Earth in miniature, mapped onto a truncated icosahedron — a soccer ball — with its regular patchwork of 12 pentagonal faces and 20 hexagonal faces.

The 20 hexagonal and 12 pentagonal panels were traditionally made of leather and stitched together.

You can see it outdoors, where the char on a built-in Eckbo-designed pentagonal table was scraped off and its newly irregular ends sealed.

It had pentagonal symmetry when rotated in each of various possible directions, something that would occur if its building blocks were icosahedral—that is, had a regular shape with 20 faces.

The building was built with about 300 pentagonal and hexagonal panels, each weighing as much as 3,200 pounds and structurally reliant on one another, so you can’t just pull a few out.