__Area__

- Area is the total amount of surface enclosed by a closed figure.

**Area of Square**

- Area of a square = Side × Side = Side
^{2 }= , where a is the length of each side.

**Example**

Calculate the area of a square of side 13 cm.

**Solution**

Area of a square = side × side

= 13 × 13

= 169 .

**Area of Rectangle**

- Area = length (l) × breadth (b)

**Example**

Find the area of a rectangle whose length and breadth are 20 cm and 12 cm respectively.

**Solution**

Length of the rectangle = 20 cm

Breadth of the rectangle = 12 cm

Area of the rectangle = length × breadth

= 20 cm × 12 cm

= 240 sq. cm.

**Area of a triangle**

Area of triangle = × base × height = × b × h

**Areas of different types of triangles**

Consider an acute and an obtuse triangle.

Area of each triangle = × base × height = × b × h

**Visualization of Area**

- In the given graph, if the area of each small square is 1 cm
^{2}, then

Area of rectangle

Area of square

__Area of irregular shapes__

The area of an irregular figure can be calculated by:

Step 1: Divide the irregular shape into regular shapes that you can recognize (eg. triangles, rectangles, circles, and squares)

Step 2: Find the area of these individual shapes and add them. The sum will be the area of the irregular figure.

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