Page 160 - Maths Class 05

Area
Breadth of a rectangle =
Length

We already know that in a square, length and breadth are equal.
Hence,

Area of a square = side × side

Suppose you have to find the area of the figure shown here. You can do so by drawing the
figure on a centimetre squared paper and then counting the number of squares enclosed by

the figure.
1. Count the complete squares. d a

There are 3 complete squares.
a d
2. Find those incomplete squares that together may b
b c
approximately equal one complete square.
c
Here, you, have a + a = 1 square.
b + b = 1 square, c + c = 1 square, d + d = 1 square

1
3. Find the area of the square left over. Take its area as square approximately.
2
4. Total area of the figure = sum of the areas of all the squares

Here, area of the given figure.

1 1
7
= (3 + 1 + 1 + 1 + 1 + ) sq cm = sq cm.
2 2
Example : A room is square in shape. If its one side is of 8 metre length, find the
area of the room.

Solution : It is given that the room has square shape.

Therefore, area of the room = side × side

= 8 m × 8 m

= 64 sq. m
Carry On

15 m

Find the total length of the wire required to fence the 3 m 3 m
following field : 6 m 6 m
3 m 3 m
3 m 3 m
Also find the area of rectangle (shaded)
and square (not shaded)
5 m 5 m

Mathematics-5 160