When you draw a shape, think about: How many sides it has. How long each side is. How many angles or corners it has. The type of angles it has - obtuse, acute or right angles. Use your ruler to ...

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 ...

Called ‘the hat’, the 13-sided shape can be arranged in a tile formation such that it never forms a repeating grid One of mathematics’ most intriguing visual mysteries has finally been solved – thanks ...