Building with Bricks Class 4 Notes: CBSE Maths Chapter 1 (Math-Magic)

Brick and It Uses

• A hard-baked clay block is used for building houses and other structures.

• It is used in the construction of walls, arches, floors, etc.

Shape of Brick

• Shapes provide an object's boundary.

• The shape of the brick is cuboid.

Shape of Brick

Solved Example 1: Can you name any two objects which are cuboid in shape?

Ans: Pencil box, Mobile phones are in the shape of cuboids.

Solved Example 2: Is the shape of the refrigerator a cuboid?

Ans: Yes, the refrigerator is in the shape of a cuboid.

What is a Cuboid?

• It is a three-dimensional shape with three dimensions: length, breadth, and height.

Cuboid Dimensions

• It has six faces, eight vertices, and twelve edges.

Cuboid faces, edges, and vertices

• Real-life examples of cuboids: shoebox, lunch boxes, and mobile phones.

Real-life Cuboid examples

Face of Shape

• A solid's face is the name given to each of its flat surfaces. 

• The face of Brick: A brick is in the shape of a cuboid with 6 rectangular faces.

• All the 6 faces of brick are rectangular.

• In the below image, the yellow color indicates 6 rectangular faces of brick.

Face of brick

Solved Example 1: How many rectangular faces does a matchbox have?

Ans: A matchbox is in the shape of a cuboid, thus having 6 rectangular faces.

Solved Example 2: In the image given below tick the faces of brick?

Faces of brick

Ans: 

Faces of brick

Symmetry(Mirror Half)

• Any Object (Shape, letter, or number) that can be divided or folded into two halves along a straight line is said to show Symmetry.

•  One half of the symmetrical shape is the mirror image of the other.

Symmetrical objects

Solved Example 1: Can you name any two alphabets which possess symmetry?

Ans: Alphabet (A), and (H) possess symmetry.

Solved Example 2: Can you give any two real objects which possess symmetry?

Ans: Leaf, Lungs in our body possess symmetry.

Line of Symmetry

• The line that divides a figure into two halves is called the line of symmetry.  

• For example, We have a tree here, which we may fold into two equal parts.

• When a figure is folded in half along its symmetry line, the two parts perfectly match.

Line of symmetry

Brick Patterns

• By combining different sizes and shapes of bricks, we may create a wide range of patterns and designs.

• Bricks can be used to create wall patterns, tiling patterns, and floor patterns.

Brick patterns

Different Wall Patterns

• Using bricks we can create different wall patterns.

• Jali patterns and Jharokha patterns are two different types of wall patterns.

• Different shapes and sizes of bricks can be used to create different jali wall patterns and jharokha patterns.

• In the Jali pattern, some equal spaces are created in the wall to create different symmetrical patterns.

Jali Patterns

•  In the Jharokha pattern, space is left in the middle of the wall to create an arch design.

Jharokha patterns

Different Floor Patterns

• Using bricks we can create different floor patterns.

• Circular floor patterns and Symmetrical floor patterns can be created.

• Different shapes and sizes of bricks can be used to create different floor patterns.

• In the circular pattern, bricks are arranged in circular order whereas in the symmetrical pattern bricks are aligned in some symmetrical design.

Floor patterns

Arch 

• An arch is a curved construction made of bricks or stones with a curved shape.

• For example, Bridge is an arch.

Arch

Cost of Bricks

• To calculate the cost of bricks, we need to multiply the number of bricks purchased by the cost of each brick.

•  Cost of bricks = Number of bricks purchased 

  
  cost of each brick.

Solved Example 1: Reena purchased 1000 bricks where each brick costs her ₹12. Find the total cost she paid?

Ans: 

• Step1: Write the number of bricks purchased = 1000

• Step2: Write the cost of each brick= ₹12

• Step3: Total cost of bricks = number of bricks purchased х cost of each brick = 1000 х 12 = 1200

• So, the Total cost of bricks is ₹1200.

Solved Example 2: Mr. Dixit purchased 5000 bricks where each brick costs her ₹10. Find the total cost she paid?

Ans: 

• Step1: Write the number of bricks purchased = 5000

• Step2: Write the cost of each brick= ₹10

• Step3: Total cost of bricks = number of bricks purchased х cost of each brick = 5000 х 10 = 50000

• So, the Total cost of bricks is ₹50000.

Solved Example 3: Sam paid ₹1500 per 500 bricks. Find the cost of each brick?

Ans: 

• Step1: Write the number of bricks purchased = 500

• Step2: Write the total cost = ₹1500

• Step3: Cost of each brick = Total cost + Total number of bricks purchased = 1500 ፥ 500 = 3

• So, the cost of each brick is ₹3.

Practice Questions:

Q1. From the image given below, answer the following questions:

Cuboid

• How long is it?

• How wide is it?

• How high is it?

Q2. Make a drawing of the given cuboidal box to show 3 of its faces.

Cuboidal box

Q3. Draw the line of symmetry for the following figure:

Draw the Line of symmetry

Answers:

Ans 1.

• 8 cm

• 2 cm

• 2 cm

Ans 2.

Drawing of Cuboidal box

Ans 3. 

Dotted line is the line of symmetry

5 Important Formulas of Class 4 Maths Chapter 1 Building with Bricks

Importance of Maths Chapter 1 Building with Bricks Class 4 Notes

• Revision notes help us quickly understand and remember key concepts before exams.

• They save time by focusing on essential information and skipping unnecessary details.

• These notes simplify complex topics, making them easier to understand and use.

• They provide practical examples that show how theoretical knowledge is used in real-life situations.

• They increase confidence by clearly understanding what to expect in exams.

• The Class 4 notes of Chapter 1 Building with Bricks cover the fundamental concepts of Building with Bricks.

Tips for Learning the Maths Chapter 1 Building with Bricks Class 4 Notes PDF

• Observe brick patterns and designs to better understand shapes and arrangements.

• Practice drawing rectangles and squares to understand area and perimeter calculations.

• Look for symmetrical patterns in brick designs and practice identifying symmetrical shapes.

• Relate the brick designs and calculations to real-life buildings or structures to make learning more practical and fun.

Conclusion

The Building With Bricks Class 4 Revision Notes CBSE Maths Chapter 1 provides a comprehensive and detailed overview of the chapter, introducing students to the concept of 3D objects and the most primitive and common object, a brick. The notes cover important topics such as the six faces of a brick, different brick patterns, and the different ways bricks are used in modern times. The notes also offer practice exercises and questions that help students test their understanding of the chapter and prepare for their exams. These revision notes are an excellent resource for students who want to improve their maths skills and score well in their exams. They are designed by experts according to the CBSE syllabus for Class 4 students and cover all the important topics in the chapter. Overall, the Building With Bricks Class 4 Revision Notes CBSE Maths Chapter 1 are an essential resource for students who want to excel in their mathematics studies.

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