The surface of the sphere and the plane are two possible 2D spaces ... will be invaluable to understanding the world in which ...

Save guides, add subjects and pick up where you left off with your BBC account. Two-dimensional (2D) shapes are completely flat. They cannot be picked up. 2D shapes can be found printed in a book ...

Shapes with 4 sides Explore four-sided shapes looking at straight lines, curved lines and 2D shapes. What are 2D shapes? Explore the properties of 2D shapes from one-sided circles to the eight ...