II. Questions to Ponder: 1. Consider the stars in the night sky. Do they represent points? 2. Consider the moon in its fullest form. Would you consider a full moon as a representation of a point? 3. A pencil is an object that represents a line. Does a pencil extend infinitely in both directions? Is a pencil a line?
A point does not have any physical dimension. So a full moon as a representation of point would be a bit weird. But it could be a representation of a plane.
I've never seen a pencil that extends infinitely, so no. Still, a pencil could represent a line; it would be called a line segment, though.
