A ray has one end-point only.

A segment has one end-point only.

The ray $\mathrm{AB}$ is same as ray $\mathrm{BA}$.

Only a single line may pass through a given point.

Two lines are coincident if they have only one point in common.

In the following figure, name the five line segments:

In the following figure, name the five rays:

In the following figure, name four collinear points.:

In the following figure, name two pairs of non-intersecting line segments.