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Shapes and Designs Class 3 Notes CBSE Maths Chapter 5 [Free PDF Download]

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NCERT Class 3 Maths Chapter 5 Shapes and Designs Revision Notes

Last updated date: 02nd Feb 2023
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One of the fascinating chapters of the CBSE Class 3 Maths syllabus, Shapes and Designs teaches students the concepts of edges, lines, folds, and shapes. They will also learn the different types of shapes and how to make designs with them in this chapter. To make it easier for the young students of Class 3, our experts have formulated Shape and Designs revision notes.


The easy language of these revision notes will enable students to comprehend these geometrical concepts effectively. Students will learn how to answer questions related to lines, edges, corners, shapes, positions, locations, etc of objects from these revision notes. The images of Shape and Designs are illustrated in these notes for a better understanding of students.


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Revision Notes Class 3 Mathematics Chapter 5 - Shape and Designs

Shapes

  • Shapes provide an object's boundary.

  • A boundary is created by mixing the curves, points, and line segments to form shapes. 

  • Examples of shapes: circle, square, rectangle, triangle, and so on.


Different shapes


Different shapes


Different Types of Shapes

The following classification is used to determine the base of each shape:

  • Open Shapes: Open shapes are made up of line segments or curves that do not intersect and are not continuous. 

Example: An open shape is represented by the letter C.


Open shape


Open shape


  • Closed Shapes: Closed shapes are those that can be traced without breaking. They both begin and end in the same location. 

Example: A closed shape is represented by the letter D.


Closed Shape


Closed Shape


Solved Example 1: Is alphabet (A) a closed shape?

Ans: No, alphabet (A) is not a closed shape.


Solved Example 2: Give 3 examples of closed shape alphabets?

Ans: 3 examples of closed shape alphabets are (O), (B), and (D).


Solved Example 3: Give 2 examples of open shape alphabets?

Ans: 2 examples of open shape alphabets are (U), and (S).


Circle

  • A circle is defined as a closed-form. 

  • It's classified as a two-dimensional geometric shape with a round shape. 

  • There are no lines or corners on it.

  • For example, a vehicle's steering wheel, a pizza base, or a dartboard.

     

Circle


Circle


Oval 

  • An oval is a slightly extended form that resembles a circle. 

  • There are no straight lines or corners on it. 

  • The number zero, for example (0).


Oval


Oval


Square

  • It is a closed two-dimensional shape with four sides. 

  • Each side is measured at the same length. 

  • A chessboard and a carrom board, for example.


Square


Square


Triangle

  • A triangle is a three-sided geometric shape that is classified as two-dimensional. 

  • For example, one slice of cheese burst pizza in the shape of sour nachos.


Triangle


Triangle


Rectangle

  • It is a shape with four sides. 

  • It's a two-dimensional geometric shape with opposite sides that are the same length. 

  • For example, a laptop screen, a touch screen phone, and so on.


Rectangle


Rectangle


Counting of Triangles

  • For counting triangles, add numbers to the base of smaller triangles. Then add the base numbers to calculate the total number of triangles.


Solved Example 1: Annie wants to count the number of triangles present in the given image?


Counting Rectangles


Counting Rectangles


Ans: Here, Annie wants to count the total number of triangles present in the image. So, Annie will use the concept of counting shapes to find how many triangles are present:

  • Step1: Identify the different shapes present in the image. Here, in the above image, only triangles are present.

  • Step2: Add the numbers to the base of the small triangles.


Base Triangles


Base Triangles


  • Step3: To calculate the total number of triangles, add base numbers.


Total Triangles


Total Triangles


  • Total number of triangles = 3

  • So, the total number of triangles present in the image is 3.


Solved Example 2: Count the number of triangles present in the given image?


Counting Triangles


Counting Triangles


Ans: Here, we want to count the total number of triangles present in the image. So, we will use the concept of counting shapes to find how many triangles are present:

  • Step1: Identify the different shapes present in the image. Here, in the above image, only triangles are present.

  • Step2: Add the numbers to the base of the small triangles.


Base Triangle


Base Triangle


  • Step3: To calculate the total number of triangles, add base numbers.


Addition of base numbers of triangles


Addition of base numbers of triangles


  • Total number of triangles = 10

  • So, the total number of triangles present in the image is 10.


Solved Example 3: Sam wants to count the number of triangles present in the given image?


Counting Triangle


Counting Triangle


Ans: Here, Sam wants to count the total number of triangles present in the image. So, Sam will use the concept of counting shapes to find how many triangles are present:

  • Step1: Identify the different shapes present in the image. Here, in the above image, only triangles are present.

  • Step2: Add the numbers to the base of the small triangles. Here, we have 2 small triangles in the first layer and 2 small triangles in the second layer.


Base Triangle


Base Triangle


  • Step3: To calculate the total number of triangles, add base numbers present on each layer.


Addition of base triangle


Addition of base triangle


  • Number of triangles in the first layer  = 3

  • Number of triangles in the second layer = 3

  • Total number of triangles in both layers = 3+3 = 6

  • So, the total number of triangles present in the image is 6.


Edges of Shapes

  • They are the lines that outline a shape.

  • For example, a square has 4 edges.


Edges of a square


Edges of a square


Corners of Shapes

  • They are the pointed parts or vertices where edges meet.

  • For example, a rectangle has 4 corners.


Corners of a rectangle


Corners of a rectangle


Solved Example 1: How many edges does a triangle have?

Ans: A triangle has 3 edges.


Solved Example 2: How many edges does a ball have?

Ans: A ball has zero edges.


Solved Example 3: How many corners does a square have?

Ans: A square has 4 corners.


Solved Example 4: How many corners does an oval have?

Ans: An oval has 0 corners.


Patterns

  • We may make a variety of patterns or designs with different basic shapes.

  • Weaving patterns, tiling patterns, and floor patterns are all examples of designs.


Different patterns


Different patterns


Practice Questions

Q1. Write (A) for closed shape and (B) for open shape in the following image.


Open and closed shapes


Open and closed shapes


Q2. Count the number of different basic shapes in the following image.


Different basic shapes


Different basic shapes


Answers

Ans 1.


Open and closed shapes


Open and closed shapes


Ans 2.

  • Number of squares: 4

  • Number of rectangles: 5

  • Number of triangles: 5

  • Number of circles: 4

  • Number of ovals: 4


Importance of Shape and Design Class 3 Chapter 5

  • This chapter has been formulated by the NCERT to introduce various geometrical concepts to Class 3 students. By studying this chapter, students will become ready for the advanced geometric concepts taught in the higher classes.

  • Students will be able to identify and differentiate between lines, edges, corners, positions, locations, etc.

  • The image illustration will enable students to imbibe geometrical concepts of straight lines, curved lines, edges, corners, etc.

  • There are excellent activities covered in this chapter that enables students to realize how folds and creases on paper can create new shapes. They will learn how to create new corners, lines, edges, curves, angles, etc., and will gain hands-on geometrical skills.

  • They will also solve various common puzzles to understand the edges and corners of shapes. They will also become skilled in making new objects using given shapes.

  • On moving further, students will get to know what patterns are and how they can be recognized.


Benefits of Class 3 Maths Chapter 5 Shapes and Designs Revision Notes

By using these revision notes for Class 3 Maths Chapter 5, students will be benefitted in the following ways.

  • Understanding different types of shapes and their differences

  • Learning how to draw or make shapes on or with paper respectively

  • A simple explanation of the concepts will help you to make a maths border design.

  • You can easily complete the syllabus for Class 3 drawing for this chapter at home and prepare for the exams.

  • The chapter will also help students to realize geometric shapes according to the number of sides and symmetry.

By using the revision notes, you can also find the answer to what name is given for a shape with 10 sides. Solving these questions will enhance the intellect and comprehension skills of a Class 3 student.


Conclusion

Utilize these simple explanations of Shapes and Designs revision notes prepared by the subject experts at Vedantu to understand the basic geometrical concepts of NCERT Class 3 Maths Chapter 5 and comprehend the various geometrical shapes by recognizing their sides, edges, patterns, etc.


Important Related Links for CBSE Class 3

 

Study Materials for CBSE Class 3 Maths

FAQs on Shapes and Designs Class 3 Notes CBSE Maths Chapter 5 [Free PDF Download]

1.  How can I recognize the different edges of a shape?

Refer to the revision notes on Vedantu for NCERT Class 3 Maths Chapter 5 and understand the meaning of sides first. Learn to recognize the edges of a given shape and find its geometrical significance.

2.  How can I prepare for Chapter 5 Shapes and Designs before an exam?

Refer to the revision notes formulated by the experts for quick recall of concepts. Go through these notes before an exam and remember how to solve the problems.

3. Why should I download Vedantu’s revision notes?

The revision notes are the precise presentation of the basic geometrical concepts by sticking to the CBSE standards for Class 3. It is a good study material you can use to resolve queries. 

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