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 ...

John Etnyre receives funding from the National Science Foundation and the Elaine M. Hubbard Distinguished Faculty Award When you look at your surrounding environment, it might seem like you’re living ...

Two-dimensional (2D) shapes are completely flat. They have two dimensions – length and width. A polygon is a closed 2D shape with straight sides that meet at vertices. Polygons can be regular or ...