Polygons have names that show the number of sides they have. A three-dimensional (3D) shape is a solid shape. 3D shapes have three dimensions - length, width and depth. Look at the shapes of the ...

Rui: No, it's 3D as it's not flat ... Other times you can see shapes, but you might not know the names. If you don’t know the name of a shape, you can use words to describe their properties.