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.

Definition of in Line-segment

                       Line segment \(\overline{AB}\)

          Line segment \(\overline{AB}\)

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

Lines passing through a point O

           Line AB

Lines passing through a point O

      Line segment CD

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.

A Geometrical Ray

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.

Geometrical Shape Ray


Distinction between line-segment, ray and line:

Line-segment

1. It has two end points.



2. The length of a line-segment is definite. So, it can be measured.


3. The symbol of a line-segment is _____

Ray

1. Ray has one starting point and another near the arrowhead.


2. It has a starting point but no other end point. So, its length cannot be measured.

3. The symbol of a ray is

Line

1. There are no end points in a line.


2. There are no end points. So, length of a line cannot be measured.


3. The symbol of a line is

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

From Line-Segment Ray and Line to HOME PAGE




Didn't find what you were looking for? Or want to know more information about Math Only Math. Use this Google Search to find what you need.



New! Comments

Have your say about what you just read! Leave me a comment in the box below. Ask a Question or Answer a Question.

Share this page: What’s this?

Recent Articles

  1. Successor and Predecessor | Successor of a Whole Number | Predecessor

    May 24, 24 06:42 PM

    Successor and Predecessor of a Whole Number
    The number that comes just before a number is called the predecessor. So, the predecessor of a given number is 1 less than the given number. Successor of a given number is 1 more than the given number…

    Read More

  2. Counting Natural Numbers | Definition of Natural Numbers | Counting

    May 24, 24 06:23 PM

    Natural numbers are all the numbers from 1 onwards, i.e., 1, 2, 3, 4, 5, …... and are used for counting. We know since our childhood we are using numbers 1, 2, 3, 4, 5, 6, ………..

    Read More

  3. Whole Numbers | Definition of Whole Numbers | Smallest Whole Number

    May 24, 24 06:22 PM

    The whole numbers are the counting numbers including 0. We have seen that the numbers 1, 2, 3, 4, 5, 6……. etc. are natural numbers. These natural numbers along with the number zero

    Read More

  4. Math Questions Answers | Solved Math Questions and Answers | Free Math

    May 24, 24 05:37 PM

    Math Questions Answers
    In math questions answers each questions are solved with explanation. The questions are based from different topics. Care has been taken to solve the questions in such a way that students

    Read More

  5. Estimating Sum and Difference | Reasonable Estimate | Procedure | Math

    May 24, 24 05:09 PM

    Estimating Sum or Difference
    The procedure of estimating sum and difference are in the following examples. Example 1: Estimate the sum 5290 + 17986 by estimating the numbers to their nearest (i) hundreds (ii) thousands.

    Read More