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 ...

2D shapes can be described by their sides, their angles and their symmetry. The sides might be equal in length and some might be parallel. The angles could be right angles, but sometimes they are ...

Up until about two decades ago, all mammograms were done using an X-ray machine, which generated two-dimensional (2D) images of breast tissue. In 2011, however, the U.S. Food and Drug Administration ...

We've traditionally divided the best digital art software into 2D and 3D. We even have a dedicated guide to the best 3D modelling apps for iPad. But in 2025, the line between 2D and 3D art is becoming ...