**Pre-Requisites**

- Basic knowledge on triangle , square, circle , rectangle and bounded figures.

## Learning Objective

On successful completion of this lesson, students will be able to:

- demonstrate basic knowledge on area of bounded figures.
- analyze the bounded figures and their area.
- develop problem-solving skills.
- apply in real life.

**Dictionary**

**Area**: Bounded Surface**Picture**: Figure**Graph**: Grapgh or Sketch**Percentage**: %age**Average**: Mean**Numeral**: Number**>**: Greater than**<**: Lesser than**=**: Equal to**Ascending**: Increasing**Descending**: Decreasing**Order**: Sequence

**22.1 Introduction**

#### 22.1.1 Figure

=> Figure: Picture that we draw on a piece of paper is called a figure.

e.g:

=> Bounded figure: Closed figure is called a bounded figure.

e.g:

#### 22.1.2 Area

=> Area: The measure of the amount of surface enclosed by a closed figure is called its area.

e.g1: Rectangle , Square , Triangle , Polygon, Circle etc.

#### 22.1.3 Comparison of areas

=> Similar figures: Area **∝** Size

=> Different figures: Find areas of the both figures and compare by their values of the areas i.e Area **∝** Value

#### 22.1.4 Unit of Area

1.Square metre: Let’s a square having 1 metre of each side.

=> Area = 1 square metre or 1 sq.m or 1 m².

2. Square centimetre: Let’s a square having 1 centimetre of each side.

=> Area = 1 square centimetre or 1 sq.cm or 1 cm².

**22.2 Area of a Rectangle **

=> Let’s a Rectangle whose length is l amd breadth is b.

Then,

#### Formula

Area of a Rectangle

A = (l x b) sq. unit

l = A/b unit

b= A/l unit

**22.3 Area of a Square**

=> Let’s a Square whose side is s.

Then,

#### Formula

Area of a square

A = (s x s) sq. unit

#### Solved Examples

**Ex1. Find area of a Rectangle whose length is 10 m and breadth is 5 m.**

**Sol**. Given that:

l = 10 m

b = 5 m

A = (l x b) sq. unit = (10 x 5) sq.m = 50 sq.m ans.

**Ex2. Find area of a square whose side is 5 m.**

**Sol.** Given that:

s = 5 m

A = (s x s) sq. unit = (5 x 5 ) sq.m = 25 sq.m ans.

**22.4 Practice Sets **

- Fill Type
- Match Type
- Order Type
- Conversion Type
- Compare Type
- Error Type
- Statement Type
- True/False Type
- Related Type
- Day-to-Day Type
- Miscellaneous Type

#### Set-1

#### Set-2

#### Set-3

#### Set-4

#### Set-5

**22.5 Quiz**

**22.6 Test**

**22.7 Exam**

The exam will be conducted after the completion of the course.

**22.8 Ask Question**

Ask your doubts **here**

#### …..The End…..

**Other Notes**

- Counting from one to hundred: एक से लेकर सौ तक गिनती
- Punctuation Mark: विराम चिन्ह
- Roman Numerals : 1 to 3000
- Testing
- Words Start with letter G
- Words Start with letter F
- Words Start with letter E
- Words Start with letter D
- Words Start with letter C
- Words Start with letter B