Two-dimensional (2D) shapes are completely flat. 2D shapes can be found printed in a book or on a website. 2D shapes have sides and corners. A rectangle has 4 straight sides and 4 corners. A square is ...

There are two sorts of lines that are used to make shapes. These are curved lines. These are straight lines. A two-dimensional or 2D shape is made up of lines. Sometimes the lines are curved and ...