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 ...

Can you choose the correct shapes using the number of sides and corners? Rise and Shine is available to stream on pbs.org and the free PBS App, available on iPhone, Apple TV, Android TV ...

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 ...