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32
Multiply eight by four.
Class 4 · Bangla Version · Mathematics
Area and perimeter
Explore area and perimeter with an example and your own answers.
About this lesson and its coverage
Original Kidemy foundation practice · Read the example, write your answers, then check. This starter is shared across class versions; it is not a complete board-specific lesson or course.
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Learn the idea
Area measures a surface in square units. Perimeter measures the boundary. For a rectangle, area is length times width.
Worked example
A rectangle 5 cm by 3 cm covers 15 square centimetres. Its perimeter is 16 cm.
- Read the example and explain which rule or evidence it uses.
- Try each task yourself, then compare the answer and its reason.
Your written practice
Show your working on paper. Check your answer, then choose Next.
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24
Add both lengths and both widths.
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7
Seven times seven is forty-nine.
Take it further
Apply the idea in a new situation and explain your method. Open writing needs a guardian or teacher to review it.
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36
Area is length multiplied by width.
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8
Divide area by width.
Write in your own words. A guardian or teacher should review this response.
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Both perimeters are 20 cm. Their areas are 16 cm² and 25 cm², so the areas differ.
Distinguish distance around from surface covered.
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