What is the difference between a 2D shape and a 3D object?

Fin and Snoot look at 2D shapes and 3D objects with the help of a curious machine.

What makes a shape 2D?

A shape is 2D if it is flat. 2D means it has two dimensions:

  • length and breadth

or

  • length and height

2D shapes include circle, triangle, square, rectangle. pentagon, hexagon.

A square has two dimensions - length and breadth

What makes an object 3D?

An object is 3D if it is has three dimensions:

  • length, breadth and height

3D objects include sphere, cube, cuboid, pyramid, cone, prism, cylinder.

A cube has three dimensions - length, breadth and height
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What is the difference between a 2D shape and a 3D object?