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 ...

When most people think of shapes, they imagine a triangle, a rectangle, or maybe even a fancier-sounding rhombus or trapezoid. But to mathematicians, shapes encompass a vast universe of surprising ...

Two-dimensional (2D) shapes are completely flat. They cannot be picked up. 2D shapes can be found printed in a book or you can draw them on a piece of paper. 2D shapes have sides and corners (also ...

Complete this interactive activity to find out more about 3D shapes and then put your knowledge to the test. Cubes have 6 flat faces which are all the same size. Everyday things that have the shape of ...

Hunt for shapes and make familiar objects by putting together several different shapes. Warm up with a Mystery Math Mistake to tell whether Dotson's 10-frames represent a number more than his focus ...