The Geometiles pumpkin a patch. #mathsky

This is an entry for the 3rd day of #mathober2025 (polyhedron) and also the 1st day (link). It is a variation on a rhombicuboctahedron with a projection of the Borromean Rings. #mathober #mathsky

A fun cube dissection. #mathsky #mathart

Some piñata inspired polyhedra for #CincoDeMayo2025 ! #mathart #mathematicalart #mathsky

Look what the #easteregghunt turned up! #mathsky #edusky #mathart

My most recent homage to #eggs— the bottom is half of an icosidodecahedron, and the top is part of a rhombicosidodecahedron. #mathsky #edusky #mathart

Celebrating #nationalquiltingmonth with two classic quilting blocks: the Sawtooth Star and Dutchman’s Puzzle. Geometiles allow you to create these patterns quickly so that you can focus on their geometry even if you don’t know how to sew. See Geometiles.com/quilts for examples. #mathsky #edusky

Celebrating this year’s Pi(e) Day with this fluted number! It comes with its own pie stand, made for the occasion. Watch video to see how two flat surfaces come together to make the pie— or should I say PIElyhedron?? Mobies make the thin pedestal of the pie stand possible. #mathsky #piday2025

Wait for it… this 7 yr old is discovering a new way to play with Geometiles. He’s treating the chain of rectangles as a multi-hinge system, and he finds it “satisfying” to experience the system unfold from a triangle to various other shapes under the effect of gravity. #edusky #mathsky #iteachmath

Just in time for #chanukah2024 , here is an easy to make Geometiles Dreidel. It’s made of eight 30-60-90 triangles and four right isosceles triangles. You need to improvise your own handle for spinning it — I just glued together 4 coffee stirrers. #mathsky #iteachmath #iteachphysics