### Theory:

$$3D$$ shapes are three-dimensional solid objects. The three dimensions are length, breadth, and height.

While $$2D$$ shapes are flat, the objects of $$3D$$ shapes have the depth to them.
Example:
we consider sphere to be a soccer ball in $$3D$$ shape. While circled on a piece of paper and known as circle's $$2D$$ shape.

More 3D shapes.