In geometry a line:
- is straight (no curves),
- has no thickness, and
- extends in both directions without end (infinitely).
A line has no ends !
Play With It
Change the position of points A and B. Note that the line AB extends forever in both directions:
When it does have ends it is called a "Line Segment".
When it has just one end it is called a "Ray"
This is Cool
Now play with this one ... point "C" is made to always be an equal distance from point "A" and "B". The result is a line (all the possible position of point "C" make a line):
Point, Line, Plane and Solid