We will discuss here about points and line segment.

We know when two lines meet we get a point.

When two points on a plane surface are joined, a
straight line segment is obtained.

But if two points in a curved surface is joined,
a curved line segment is drawn.

When a line segment is
extended towards both sides unlimitedly it becomes a line.

We make arrows on both end sides of a line segment to represent a line.

Now we may say that a part of the line is known as the line segment. If there is a line l, then AB is a line segment.

A line segment is named by using the names of its endpoints. Then line segment drawn on the side is called line segment AB or line segment BA.

A line does not have any fixed length it has infinite length. But a line
segment has a fixed length. We may imagine a line as it has unlimited length
but a line segment is drawn on a plane paper.

The core of a cuboid or cube is an example of a line segment.

**There are many line segments in the following figures:**

**Note:** Line segments may be joined to form geometric figures.

**What is one dimensional figure?**

A line or a line segment is called one dimensional (1-D) figure.**Types of lines**

There are two types of lines.

(i) Straight line

(ii) Curved line

**Straight line:** If a line shows only one direction, then it is a straight line. It may be vertical, horizontal or slant.

**Curved line: **

It changes its direction.

Points, lines and line segment are the fundamental concepts in geometry.

**● ****Geometry**

**Fundamental Concepts of Geometry****Points and Line Segment****Geometrical Shapes****Two Dimensional Shapes and Lines**

**2nd Grade Math Practice**

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