Explore the properties of 2D shapes from one-sided circles to the eight-sided octagons. What is the difference between a 2D shape and a 3D object? Learn the difference between basic 2D and 3D shapes ...

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 ...