2D shapes have sides and corners (also called vertices). Here are some 2D shapes you might know. Why not see how much you know about this topic already? Then work through the page and see if you ...

and explored the range of possible shapes these rules permit. In 2D, the options are fairly limited: all tiles must have at least two cusp-like corners. But in 3D, introducing softness has some ...

A quartet of mathematicians from Yorkshire University, the University of Cambridge, the University of Waterloo and the University of Arkansas has discovered a 2D geometric shape that does not ...