Page 4 - LN 1

 Only one line can be drawn through two given points.

A B

Ray- When a line segment extended endlessly in one direction is called a ray.

A B

Here, AB is a ray.

 A ray does not have fixed length.
 A ray can be extended in one direction. It cannot be drawn on a paper. We can
simply represent a ray as above.
 We cannot measure a ray.