A polygon is a 2D shape with straight sides that meet at vertices. Polygons have names that show the number of sides they have. A three-dimensional (3D) shape is a solid shape. 3D shapes have ...

What are 2D shapes? Explore the properties of 2D shapes from one-sided circles to the eight-sided octagons. Properties of 3D shapes Learn about faces, edges and vertices.

With new platforms and tools, you have easier access to more than 5.1 million 2D and 3D digital items from our collections—with many more to come. This includes images and data from across the ...