Line-Segment, Ray and Line

Definition of in Line-segment, ray and line geometry:

A line segment is a fixed part of a line. It has two end points. It is named by the end points. In the figure given below end points are A and B. So, the line segment is called AB. A line segment is denoted as \(\overline{AB}\).

The part of a line is called a line-segment as shown below.

Only one line can be drawn passing through any two points but a number of lines can be drawn through a point.

Ray: We know about sun-rays. A sun-ray starts from the sun and goes on a direction up to endless space. Similarly a geometrical ray is considered a special kind of line which starts from a fixed point and goes to any distance to the other direction of the starting point.

The name of a ray is given with two capital letters. One letter is written at the starting point of the ray and the other letter is written near the arrow end as AB and LM.

A line, line segment and ray all are called one dimensional (1-D) figures as they have only length.

In short, a ray is a portion of line. It has one end point. A ray can be extended in any one direction endlessly. We name the given ray as \(\underset{AB}{\rightarrow}\). The first letter shows the end point. The Sun light is an example of the ray.

Distinction between line-segment, ray and line:

These explanations on line-segment, ray and line will help the kids to understand the different fundamental element of geometry and their distinction.

Related Concepts

● Basic Shapes

● Surfaces of the Solids

● Common Solid Figures

● Points, Lines and Shapes

● Types of Lines

● Geometrical Design and Models

3rd Grade Math Lessons

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