Flat or Solid?
The difference between 2D and 3D shapes
Flat shapes are drawn on paper. Solid shapes you can hold. Can you tell them apart?
Flat (2D)
A square — you can draw it
Solid (3D)
A cube — you can hold it
A flat shape (2D) is flat like a drawing — a square. A solid shape (3D) is fat and you can hold it — a cube. A circle is flat; a sphere (ball) is solid!