There’s a new brainteaser circulating the web and it’s all about shapes. The mind-boggling quiz features a variety of hidden triangles and hexagons, but it’s so tricky that only 1% of people get a ...

A 3D shape with all straight edges and flat faces is a polyhedron. Other 3D shapes with least one curved surface are not polyhedra. A 3D shape with regular polygonal faces, meeting at equal angles, is ...

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How few corners can a shape have and still tile the plane?” mathematician Gábor Domokos asked me over pizza. His deceptively simple question was about the geometry of tilings, also called ...