Math Monday

A “wobbler” consists of two intersecting circles in perpendicular planes. When you roll it along the ground, it wobbles left and right as it moves forward. I saw these 18″ diameter pine disks for sale at a lumber store and thought they would make a wonderfully large wobbler. The construction simply involves cutting a slot […]

Polyhedra lovers are fond of certain compound shapes, such as this symmetric arrangement of five concentric regular tetrahedra. If you like to make things in wood, it’s a natural challenge to cut some plywood, bevel the edges, and screw or glue together a giant geometric model. Here is Dale Seymour with his compound of five […]

By George Hart for the Museum of Mathematics If you love geometry, you can let everyone know by wearing dodecahedra with elegance and style! These dresses with sewn-on paper polyhedra embellishments were designed by Amila Hrustic. I’m not sure how one sits in a dress textured with tetrahedra, but it certainly gets points for fashion. […]