Math Monday

Math Monday: Office supplies

Math Monday: Office supplies

By George Hart for the Museum of Mathematics For a true maker, any stock of unused office supplies is perceived as a challenge to make some kind of construction. Here is an icosahedrally symmetric geodesic sphere made from ninety paper fasteners. It was built by Rolando Pontalti of Trento, Italy, who also made last week’s […]

Math Monday: Five tetrahedra

Math Monday: Five tetrahedra

By George Hart for the Museum of Mathematics Here is a geometric assembly challenge which you can try to make with wooden dowels or any other conveniently long cylinders. Each of these thirty aluminum rods touches ten others. The construction is rather tricky to accomplish even if you properly understand it as a compound of […]