Class 3 Maths Chapter 5 Summary Notes PDF Download
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 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
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
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
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
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
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
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
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
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
Step3: To calculate the total number of triangles, add base numbers.
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
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
Step3: To calculate the total number of triangles, add base numbers.
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
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
Step3: To calculate the total number of triangles, add base numbers present on each layer.
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
Corners of Shapes
They are the pointed parts or vertices where edges meet.
For example, a rectangle has 4 corners.
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
Practice Questions
Q1. Write (A) for closed shape and (B) for open shape in the following image.
Open and closed shapes
Q2. Count the number of different basic shapes in the following image.
Different basic shapes
Answers
Ans 1.
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
The Class 3 CBSE Maths Chapter 5 - "Shapes and Designs" notes, available as a free PDF download, are a valuable educational resource for both students and educators. These notes provide a comprehensive overview of geometric concepts, making learning engaging and accessible for young learners. With clear explanations, visual aids, and interactive examples, students can grasp the fundamentals of shapes and designs with ease. These free PDF notes empower both teachers and parents to facilitate effective learning experiences. They not only promote mathematical proficiency but also encourage creativity and problem-solving skills. In essence, the "Shapes and Designs" Class 3 CBSE Maths notes serve as a vital tool for nurturing a strong mathematical foundation in students while fostering a love for mathematics.
Study Materials for CBSE Class 3 Maths
FAQs on Shapes and Designs Class 3 Maths Chapter 5 CBSE Notes - 2025-26
1. What are the main topics to focus on for a quick revision of the CBSE Class 3 Maths Chapter 5, Shapes and Designs?
For a quick and effective revision, you should concentrate on the core concepts. These include:
- Identifying 2D shapes (like squares, circles, triangles) and 3D shapes (like cubes, cones, spheres).
- Counting the number of edges (sides) and corners (vertices) for each shape.
- Understanding the difference between straight and curved lines.
- Recognising simple repeating patterns made from shapes.
2. How can I easily remember the difference between edges and corners for revision?
Think of it this way: Edges are the straight or curved lines that form the boundary of a shape, like the sides of a book. Corners, or vertices, are the points where two or more edges meet, like the sharp point of a triangle. A quick memory trick is 'edges are lines, corners are points'.
3. What is the key difference between a 2D shape like a circle and a 3D shape like a sphere?
The main difference is that a 2D shape is flat, while a 3D shape is solid and can be held. A circle is a flat drawing, like a picture of the sun. A sphere is a solid object that is round all over, like a real cricket ball. You can only draw a circle, but you can hold a sphere.
4. What is a 'pattern' in the context of this chapter?
In Shapes and Designs, a pattern is a sequence of shapes or lines that repeats in a predictable way. For revision, focus on identifying the rule of the pattern. For example, in the sequence Triangle, Circle, Triangle, Circle..., the rule is that a triangle is always followed by a circle.
5. Why is it important to learn about both 2D and 3D shapes?
It's important because they describe the world around us in different ways. We use 2D shapes to draw and represent things on flat surfaces like paper. We use 3D shapes to understand and describe solid objects we can touch and see from all sides, like a tiffin box (cuboid) or a birthday cap (cone).
6. How are a square and a cube related? How can I avoid confusing them during revision?
A square is a flat (2D) shape with four equal sides. A cube is a solid (3D) object that is made up of six square faces. A simple way to remember the connection is that a square is just one flat face of a cube. Think of a Rubik's cube; the whole object is a cube, but each coloured tile on it is a square.
7. Can a shape have both straight and curved lines? Please give an example.
Yes, absolutely. Many common objects are made of shapes that combine both. A great example is a cylinder, like a can of soup. It has two flat, circular faces (made with curved lines) and a body that can be seen as having straight sides from one angle. Another example is a semicircle, which has one straight edge and one curved edge.
8. How can a quick summary of this chapter help me solve problems from the NCERT textbook?
A quick summary or revision note helps by reinforcing the fundamental rules. When your textbook asks you to 'find all the triangles in this picture,' your revision helps you instantly recall that a triangle is any shape with 3 sides and 3 corners. This allows you to apply the concept quickly and accurately to solve the problem, instead of guessing.
