NCERT Class 4 Mathematics Maths Mela Chapter 01 Shapes Around Us PDF Download

Chapter 1: Shapes Around Us

Diksha wanted to go to a big city during her summer holidays. Her father took her to Delhi and they visited many old and new interesting monuments like the India Gate, Qutub Minar, Safdarjung Tomb, Akshardham, the National Museum, Jantar Mantar and Sansad Bhawan.

Now she is trying to make a model of India Gate using her wooden blocks.

[Figure: Diksha building a model of India Gate with wooden blocks, See in your textbook]

[Figure: Pictures of the Charminar and a hut, See in your textbook]

Try to make a model of the buildings shown here using blocks.

1. What parts of the building have you shown in your model (for example, roof, pillars, base, etc.)?
2. Why did you select these parts?
3. What shapes will model these parts well? ______________
4. How is your model similar to the picture of the real building? ______________
5. How is it different from the real building? ______________

Discussion

What would happen if you removed one piece of your model?

• Would the model still look like the original building?
• In what ways could you make the model even better?

Teacher's Note

Before you start building, look at the building and name its main parts, such as the base, the walls or pillars, and the roof. Then choose one block for each part. If a part of your model does not look right, try a different block and compare again with the picture.

Project Work

Encourage learners to observe a street carefully and make a model showing the main buildings on the street.

[Figure: A model of a street with buildings, See in your textbook]

"I have made something. Look at my Qutub Minar."

[Figure: A boy holding his block model, and the Qutub Minar, See in your textbook]

Do you think it looks like the Qutub Minar? ..................

What shape would you use if you made a model of the Qutub Minar? Why? ..................

How many such shapes will you use? ..................

Do you know

The Qutub Minar is a World Heritage site and the tallest building made up of bricks. It has 5 storeys and 379 stairs.

Earlier, people made buildings with clay bricks, stone blocks or wood. Today we also use concrete blocks, hollow blocks, etc.

What is common to all of these bricks? ..................

[Figure: A clay brick, a stone block and a wooden block, See in your textbook]

Note for Teachers

Ask learners to collect different boxes, bottles, cans, coconut shells, etc., to model the given buildings.

Craft

1. Make a sphere-like shape with paper strips.

[Figure: A sphere-like shape made of paper strips, See in your textbook]

Diksha has folded open and flattened a box to see what an open box looks like. This is called the net of the box. If you fold along the dotted lines, you will get the box back.

[Figure: Diksha flattening a box, and the net of a box, See in your textbook]

2. Use the nets given at the end of the book to make the models shown below.

Is a cube also a prism?

What is the difference between a prism and a pyramid? Discuss.

Teacher's Note

When you fold a net, every flat part of it becomes one face of the solid. Before folding, count the flat parts of the net, then fold slowly along the dotted lines and check that each edge meets another edge exactly.

Key Points

• You can model a building by choosing a simple block shape for each of its main parts, such as the base, the pillars and the roof.
• The Qutub Minar is a World Heritage site; it has 5 storeys and 379 stairs.
• Buildings have been made from clay bricks, stone blocks and wood, and today also from concrete blocks and hollow blocks.
• A net is the flat shape you get when you open and flatten a box; folding it along the dotted lines gives the box back.

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