हिंदी

Can you think of how to cut a postcard so that you can pass through it? - Mathematics

Advertisements
Advertisements

प्रश्न

Can you think of how to cut a postcard so that you can pass through it?

आकृति
Advertisements

उत्तर

Yes, I can pass through a postcard by making a loop from it.

The steps are given below:


Make lines on the postcard as shown in this figure.

Cut the postcard along the lines which touch its border.

This will make a loop as shown here.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 11: Area and its Boundary - Area and its Boundary [पृष्ठ १५०]

APPEARS IN

एनसीईआरटी Math - Magic [English] Class 5
अध्याय 11 Area and its Boundary
Area and its Boundary | Q 7 | पृष्ठ १५०

संबंधित प्रश्न

The nearest star to our solar system is 4.29 light years away. How much is this distance in terms of parsecs? How much parallax would this star (named Alpha Centauri) show when viewed from two locations of the Earth six months apart in its orbit around the Sun?


Just as precise measurements are necessary in science, it is equally important to be able to make rough estimates of quantities using rudimentary ideas and common observations. Think of ways by which you can estimate the following (where an estimate is difficult to obtain, try to get an upper bound on the quantity):

 

the number of strands of hair on your head


Write true or false.

Every measurement involves two things – a number and a unit.


Complete the analogy.

Height of a person: cm :: Length of your sharpened pencil lead:______?


Match the following.

1. Length of the fore arm metre
2. SI unit of length second
3. Nano 103
4. SI Unit of time 10–9
5. Kilo Cubit

While measuring the length of a sharpened pencil, the reading of the scale at one end is 2.0 cm and at the other end is 12.1 cm. What is the length of the pencil?


What is the length of a 100 rupee note? Guess. Now measure it using a scale.


Measure the yellow rectangle. It is ________ cm long.


How many stamps are needed to cover the rectangle?


Now cut strips of equal sizes out of it. Using tape join the strips, end to end, to make a belt.

How long is your belt? _________


There are two beautiful lakes near a village. People come for boating and picnics in both the lakes. The village Panchayat is worried that with the noise of the boats the birds will stop coming. The Panchayat wants motorboats in only one lake. The other lake will be saved for the birds to make their nests.

  • A longer boundary around the lake will help more birds to lay their eggs. So which lake should be kept for birds? Which lake should be used for boats?

What is the unit of measurements of very small lengths?


What is the unit of length?


The Unit used to measure length ______.


To measure the distance of a planet from the earth, ______ method is used.


The distance of a galaxy is of the order of 1025 m. Calculate the order of magnitude of time taken by light to reach us from the galaxy.


According to the modern definition, what fraction of a second does light travel to define one metre?


What is an Astronomical Unit (AU)?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×