**What is a line?**

- A line is a straight one-dimensional figure that extends in both the directions without any end (infinitely)
- It consists of countless number of points.

Here, line passes through point A and point B, therefore, it is written as AB (and read as line AB)

The arrow on AB indicates that it extends on both sides endlessly.

**What is a ray?**

- A part of a line with a start point but no end point, is called a ray.
- It goes endlessly in one direction

**What is a line segment?**

- A part of a line that has two end points in both the directions, is called a line segment.
- It is the shortest distance between two points

**What are intersecting lines?**

When two or more *lines* cross each other, they are called *intersecting lines*.

OR

If two lines have common point, they are called intersecting lines

**What are parallel lines?**

Two lines that never intersect each other, are called parallel lines.

OR

Two lines which never cross each other at any point, are called parallel lines

**How points are arranged to form a triangle?**

For making a triangle three points are needed and at least one of the three point should not be collinear (on same line).

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