1. find missing side and perimeter

2. Perimeter The perimeter of a closed figure is
the total measure of the boundry.
Rahman is a farmer. He has to fence his field
What length of the barbed wire I should buy to fence my field?
The answer is,
I should buy 8 m + 12 m +10 m + 4 m = 34 m barbedwire.

3. ? Example 1: Find the Perimeter We have one side missing.
We have to find it before we can find
perimeter.
6cm
11cm
2cm
4cm
5cm ?
5cm
In the 11 cm side
, a part of the line is 6cm
since opposite side is 6cm
The remaining side of 11 cm is
11 cm – 6cm = 5cm
6cm
Hence opposite side which is the missing side = 5cm
Since we have found all side we can now we can find
the perimeter
Perimeter = Adding all the sides of the above shape =
= 34 cm

4. ? Example 2: Find the Perimeter 6 cm 8 cm 2 cm 4 cm 4cm 2cm 2cm
We have one side missing.
We have to find it before we can find perimeter.
In the 8 cm side
,two part of line each is 2cm
since their opposite side is 2cm
The remaining side of 8 cm is 8 cm – 2cm – 2cm = 4cm
Hence opposite side which is the missing side = 4cm
Since we have found all side we can now we can find the perimeter

5. Perimeter = Adding all the sides of the above shape
Example 2: Find the Perimeter
6 cm
8 cm
2 cm
4 cm
Perimeter = Adding all the sides of the above shape =
= 28 cm

6. ? Example 3: Find the Perimeter 5cm 2cm 4cm We have one side missing.
We have to find it before we can
find perimeter.
2cm
9 cm ?
5cm
2cm
In the missing side
,two part of line each is 2cm
since their opposite side is 2cm
and third part of the line is 5cm
since opposite side is 5cm
We have all part of missing side. Therefore missing side is 2cm + 5cm + 2cm = 9 cm
Since we have found all side we can now we can find the perimeter

7. Perimeter = Adding all the sides of the above shape
Example 3: Find the Perimeter
9 cm
5cm
2cm
4cm
Perimeter = Adding all the sides of the above shape =
= 36 cm

8. Try these
Find the perimeter
7cm
4cm
3cm