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Line for Class 3 Math

This learning concept will introduce the students to points and lines of geometry. Also, the students will get to know about the type of lines.
In this learning concept, students will learn to:

  • Identify points and lines
  • Classify different types of lines
  • Identify different types of straight lines
  • Classify Ray and line segment

The learning concept is explained to class 3 students with examples, illustrations, and a concept map. At the end of the page, two printable worksheets for class 3 with solutions are attached for the students.

Download the worksheets of lines and solutions to assess our knowledge of the concept.

Geometry is a branch of mathematics, that is primarily concerned with the shapes and sizes of objects, their relative position, and the properties of space. Here we will discuss the point, line, line segments and rays.


Point Definition Geometry

In geometry, a point is a location represented by a dot. A point does not have any length, width, shape or size, it only has a position. Generally, the points are named with capital letters.



A line is made of a set of points. A line has no thickness and can extend indefinitely in both directions. The length of a line is undefined and it can have an infinite number of points. In the below picture, AB is a line.


Types of Lines

There are two types of lines –

(i) Straight lines     (ii) Curved lines


Straight Line:

A straight line is a line that does not have any curve in it. There are different types of straight lines.


Curved line:

When a line is not straight, it is called a curved line.

Line Segment

A line segment is a part of a line that has two endpoints and a fixed length. Line and line segments are different. A line segment cannot be extended indefinitely in both directions. In the below picture, MN is a line segment.


Ray Definition

Ray is a part of a line that has a start point but no definite endpoint. A ray can be extended to infinity in one direction. In the below picture PQ is a ray.

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