Two-dimensional (2D) shapes are completely flat. They cannot be picked up. A polygon is a 2D shape with straight sides that meet at vertices. Polygons have names that show the number of sides they ...

The net of a 3D shape is what it looks like if it is opened out flat. There are many types of nets for the different 3D shapes. A net is made from polygons that can be folded and joined to make a ...

It may seem distinctly low-tech compared to some of the many technology trends I write about, but 3D and 4D printing will have very wide applications – and could be particularly powerful when combined ...

When you want to visually imply growth, steps, directions, output or even a process, you might choose an arrow shape. Arrows are one of the most commonly used shapes in PowerPoint, and fortunately ...

Flat-pack furniture is commonplace, and flat-pack pasta might be one day too. Wen Wang of Carnegie Mellon University in Pennsylvania and her colleagues have developed edible 2D pasta that swells into ...