What do you mean by collinear points? How many lines can you draw passing through three collinear points?

What do you mean by collinear points? 

Given three collinear points $A, B, C$. How many line segments do they determine? Name them.

How many line segments can be obtained in  with two points $A,B$ $?$

Mark the following points on a sheet of paper. How many line segments can be obtained?

Three non-collinear points $A\mathit{,}\mathit{ }B\mathit{,}\mathit{ }C$

Mark the following points on a sheet of a paper. Tell how many line segments can be obtained in each case?

Four points such that no three of them belong to the same line.

Mark the following points on a sheet of a paper. Tell how many line segments can be obtained in each case?

Any five points so that no three of them are collinear.

In the below figure, name the four pairs of lines.

In the adjoining figure, name:  Four collinear points.

In the adjoining figure, name:  Three non-collinear points.