मराठी

A square has a boundary of 12 cm. From the corner of this square, a small square of side 1 cm is cut off. Will the boundary of B be less or more? Find its length. If you cut a 1 c - Mathematics

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प्रश्न

A square has a boundary of 12 cm.

  1. From the corner of this square, a small square of side 1 cm is cut off. Will the boundary of B be less or more? Find its length.
  2. If you cut a 1 cm square to get shape C, what will be the length of the boundary of C?
Square New shape
थोडक्यात उत्तर
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उत्तर

  1. The boundary of shape ‘B’ is equal to the boundary of shape ‘C’
    The boundary of ‘B’ = 12 cm.
  2. The boundary of shape ‘C’ will be equals to 14 cm.
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Fields and Fences
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 13: Fields and Fences - Exercises [पृष्ठ १५५]

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एनसीईआरटी Math - Magic [English] Class 4
पाठ 13 Fields and Fences
Exercises | Q 1. | पृष्ठ १५५

संबंधित प्रश्‍न

How much more wire will Ganpat need for his field?


Here are pictures of some more fields. Find out which one has the longest boundary?




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Ganpat’s wife works in a tailor’s shop. She has to fix lace around a table cloth.

She bought a 100 metre roll of lace.

Look at the picture of the table cloth and tell how much lace is used for one table cloth.


Find out the length of the boundary of these shapes. (Hint: You can use a thread)

Now count the squares to find out : 

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  2. Which shape covers the least number of squares?
  3. Which shape covers the most number of squares?

Take a 20 centimetre long thread. Make different shapes by joining the ends. Place on the squared sheet on the next page. 

find Out :

  1. How many squares are there in each shape?
  2. Which is the biggest shape?
  3. Which is the smallest shape?
  4. How long is the boundary of each shape?

  1. How many different shapes can you make by joining two squares? Draw them on the squared sheet given below. How long is the boundary of each shape?
  2. Try this activity with three squares also.

Look at the table in your classroom. Guess how many Math-Magic books you can place on it.
(Remember-The books should not overlap. Do not leave gaps between the books)

  1. Write your guess here.
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  3. What is the difference between your guess and the actual number of books?

Now look for another table.

  1. Is this table bigger than the last table? Yes/No
  2. Make a guess how many Math-Magic books can be kept on this table.
  3. Check if your guess was correct.
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  4. The difference between the sizes of the two tables is ______ books.

  1. How many Math-Magic books can be covered with one sheet of newspaper?
  2. Try covering your Math-Magic book with half a sheet of newspaper.
  3. Can you cover your book with a smaller sheet?
  4. Find the smallest sheet which can cover your book. Check if your friend used a smaller sheet than you.

  1. Which is the biggest leaf in this picture?
  2. Collect some leaves from the
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  3. Which is the biggest leaf?
  4. Which is the smallest leaf?

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