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

™

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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