This document discusses visualizing 2D and 3D shapes by looking at their top, front, and side views. It defines 2D shapes as having length and width but no thickness, and explains that 3D shapes have a top view from above, a front view from the front, and a side view from the side. Examples are given of the different views of common objects like a matchbox and car to illustrate how to visualize the views of 3D shapes from different angles.