Download - Dynamic slide version 1.0
Our AimsWith this software, we hope toa) give variety in teaching-learning process.b) enhance pupils’ understanding through
interactive learning.c) expose pupils with the use of ICT.
Done by:
1) Cikgu Sitti Khatijah Patingo
3) Cikgu Siti Haslina Hj.Hidup
2) Cikgu Norhaziah Mohd.Hardi
TOPIC: PERIMETER AND AREA
SEKOLAH RENDAH PSB SOAS, KUALA BELAIT
New Software®
Dynamic Slide’ex
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Copyright® May 2006Mathematics Software Version 1.0
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Introduction to perimeter
Perimeter of a square
Perimeter of a rectangle
Introduction to area
Area of a square
Area of rectangle
Please select the topic by clicking the button
HOT QUIZ TO TRY!
INTRODUCTION TO PERIMETER
• WHAT IS A PERIMETER?
Answer: It is the distance all around the shape.
3 cm
A 3 cm
4 m
2 m
Click here
Click me!
B
The red line is known as Perimeter
I’m moving around the figure B
The blue line is calledPerimeter of figure B
INTRODUCTION TO PERIMETER
• Let us see another example of figure C below:
ClickPut a string around the figure
Use the ruler to measure the string
Measure
The rope is 11.1 cm long.We say that the perimeterof the figure C above is 11.1 cm
Figure C
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PERIMETER OF A SQUARE
• WHAT IS A SQUARE ?
- A square is a shape with all sides are equal.
- Opposite sides are parallel.
- All angles are right angles.
Click
Click
Click
3 cm
3 cm
3 cm
3 cm
Each side of this square is 3 cm.
The two red line and the two green line are oppositeand parallel to each other.
90° 90°
90° 90°
All the angles are 90°
PERIMETER OF A SQUARE
• HOW TO CALCULATE THE PERIMETER OF A SQUARE ?
First, look at the value of each side of the square. Click
3 cm
3 cm
3 cm
3 cm
The value for each side is 3 cm
Click
Calculation
3 cm + 3 cm 3 cm 3 cm+ + = 12 cm
From this calculation, we can say that:-
PERIMETER OF SQUARE = 4 X SIDE= 4 X 3 cm= 12 cm
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Then, add all the values together.
PERIMETER OF A RECTANGLE
• WHAT IS A RECTANGLE?
- A rectangle is a shape with opposite sides are equal.
- Opposite sides are parallel.
- All angles are right angles.
Click
Click
Click
4 cm
4 cm
2 cm2 cm
90° 90°
90° 90°
The length is 4 cm andthe breadth is 2 cm.
The two blue lines andthe two yellow lines areparallel and opposite ofeach other.
All the angles are 90°.
PERIMETER OF A RECTANGLE
First, look at the value of each side of the rectangle.
Then, add all the values together.
Click
4 cm
4 cm
2 cm2 cm
• The length is 4 cm and the breadth is 2 cm.
Click
Calculation
2 cm + 4 cm + 2 cm + 4 cm
The answer is 12 cm
Using formula,
PERIMETER OF RECTANGLE= 2 X ( LENGTH + BREADTH )= 2 X ( 4 cm + 2 cm )= 2 X 6 cm= 12 cm
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How to calculate the perimeter of a rectangle?
INTRODUCTION TO AREA
• WHAT IS A AREA?
Answer: It is the space occupied by a figure. It is measure in square
unit example: cm², m².
A
B
The red region is called Area
Click
3 cm
3 cm
4 m
2 m
A
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B
Click me
The blue region is the area of figure B
AREA OF A SQUARE
• HOW TO CALCULATE THE AREA OF A SQUARE ?- This square is made up of 1 cm by 1cm squares.
- The space covered: 1 cm by 1 cm is equal to 1 cm².
- The square is made up of nine 1 cm².
Click
1 cm
1 cm
1 cm
1 cm
The space occupied by the squareis equal 9 cm².
This known as its AREA.
Click
Click
1 cm²1 2 3
6 5 4
7 8 9
AREA OF A SQUARE
• CALCULATE THE AREA OF A SQUARE BY FORMULAFirst, look at the value of the two sides of the square.
Then, multiply the values together.
Click
3 cm
3 cm
Click
This calculation shows that, AREA OF SQUARE = SIDE X SIDE
Calculation
3 cm x 3 cm = 9 cm²
The area is 9 cm² which isthe same as the previous example
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AREA OF A RECTANGLE
• How to calculate the area of rectangle?- Look at the rectangle below, it is made up of 8 squares.
- Each square has an area of 1 cm².
Click
Click
Therefore, the total area of the rectangle is 8 cm².
1 2 3
65
4
7 8
1 cm² 1 cm² 1 cm² 1 cm²
1 cm² 1 cm² 1 cm² 1 cm²
There are 8 squares inside the rectangle.
AREA OF A RECTANGLE
• CALCULATE THE AREA OF A RECTANGLE USING FORMULALook at the value of breadth and length of the rectangle.
Then, multiply both value together.
Click
4 cm
2 cm
Click
Calculation
2 cm x 4 cm = 8 cm²
The area of the rectangle is 8 cm²
This calculation shows that,
AREA OF RECTANGLE = LENGTH x BREADTH
The breadth is 2 cm and the length is 4 cm.
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