Subject: Maths
Class: V
Chapter: Polygons
Topic: Area and Perimeter
Activity: Area and Perimeter Builder
Objectives: The student should be able to:
- explore what happens to the measurement of a two-dimensional shape such as its perimeter and area when the shape is changed
- build and draw geometric shapes and comp[are its perimeter and area.
- identify real-life situations in which area and perimeter are usefully applied.
Information input:
The area is the amount of two-dimensional space taken up by the object. It is measured in square units. A perimeter is the total boundary of the two-dimensional shape. If you want to provide fencing around the entire field you need its perimeter. Suppose you want to lay a pathway inside the field to keep a watch on your field you need its perimeter. The units of the perimeter are, cm, m etc.
Instructions: (20 minutes)
1. Read the chapter and understand the content
2. Use the google search engine and type in “PhET Simulations” in the search text box or use the link https://phet.colorado.edu/en/simulation/area-builder
3. Click on “All Sims-PhET Simulations”
4. Select “Area Builder”
5. Click the “play” button/download button and wait for few seconds (time to download application)
6. Click on the downloaded file on the left bottom corner
7. Click on the “Explore” button to run the application (need to wait for few seconds to load the application)
8. Click on the minus button on the top center of the simulation board
9. Drag 1 tile in the simulation board and estimate its area and perimeter.
10. Record your estimation in worksheet 1.1
11. Then construct a square using 4 tiles in the simulation board.
12. Estimate its area and perimeter.
13. Now take 2 tiles and repeat the step 11.
14. Repeat step 11 with 3 tiles
15. Repeat step 11 with 4 tiles.
16. Click on plus button on the top center of the simulation board
17. Now turn on the button on the left corner of the simulation board.
18. Repeat step 8 and compare your estimation with the reading given in the simulation board.
19. Go back to table 1.1. Record the readings given in the simulation board.
Follow up activity (15 minutes)
Discuss in groups why perimeter and area are not same.
1. Construct a triangle in the simulation board using ten tiles.
2. Measure its area and perimeter.
Assessment procedures
Go through the worksheet
1.1
Use the following
checklist during the lesson
Sl. No
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Group name
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Write the value of the shapes in the space
given below
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Real value
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Estimation of area
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Estimation of perimeter
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1
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Drag 1 tile
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2
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Drag 2 tiles
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3
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Drag 3 tiles
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4
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Drag 4 tiles
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Lesson Closure
Lesson
will be closed by asking some questions to recapitulate the session taught.
What
is area and perimeter?
Expected answer: The
area is the amount of two-dimensional space taken up by the object. It is
measured in square units.
A perimeter is the total boundary of the two-dimensional
shape. If you want to provide fencing around the entire field you need its
perimeter
Will a shape has
equal area and perimeter?
Expected answer: No,
it will not have equal area and perimeter
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