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 ...

This journal, titled "The Geometry of Flat and Full: Comparing 2D and 3D Shapes," explores the fundamental differences and relationships between two-dimensional (2D) and three-dimensional (3D) shapes.