A Line Segment
Take a piece of paper of any size and fold it as you wish.
Upon unfolding it, what do we see? This gives the idea of a
Line Segment AB
Let's look at the another example?
Take a random piece of string or a thread and hold it up to view it. This is another live example of a line segment being formed.

Holding a piece of string
Look Around you. Give some examples of models representing a

Edge of a box

Edge of a photographs/postcards
On the canvas to the side we have marked two points and connected them with a line.
Now, try to connect A to B by all possible routes and see if you can connect with a shorter length.
How many ways could you join?
As it turns out, the shortest joining of point A to B (including A and B) is ,in fact, a line segment.
It is denoted by AB or BA.
Here, the points A and B are called the endpoints of the segment.
Similarly, we can use a thin thread. If we hold a section of the thread with our hands and make sure that it is stretched without a slack, this again represents a line segment.(Refer to the above image)
The ends held by hands are the end points of the
Below, select any two random points and join the points to make a line segment.