2D (2-dimensional) shapes are flat and can only be drawn on paper.
3D (3-dimensional) shapes are solid and can be picked up.
You should know the names of the 2D and 3D shapes shown at the bottom of this page.
For both the 2D and 3D shapes, you should know how many VERTICES they have.
A vertex is the word we use in maths for a CORNER where two edges meet. Vertices is the plural of vertex.
Are you ready to start counting?