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Perimeter and Area Class 7 PPT

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 Page 2


The distance 
around the 
outside of a 
shape is called 
its perimeter.
8 cm
6 cm
8 cm
6 cm
The perimeter of the shape is 8 + 6 + 8 + 6 = 28cm.
First we need to find the length of each side by 
counting the squares.
( Each box stands for 1 cm)
Page 3


The distance 
around the 
outside of a 
shape is called 
its perimeter.
8 cm
6 cm
8 cm
6 cm
The perimeter of the shape is 8 + 6 + 8 + 6 = 28cm.
First we need to find the length of each side by 
counting the squares.
( Each box stands for 1 cm)
What is the 
perimeter  of each 
of these shapes? 
20 cm
18cm
  20 cm
22 cm
26cm
Page 4


The distance 
around the 
outside of a 
shape is called 
its perimeter.
8 cm
6 cm
8 cm
6 cm
The perimeter of the shape is 8 + 6 + 8 + 6 = 28cm.
First we need to find the length of each side by 
counting the squares.
( Each box stands for 1 cm)
What is the 
perimeter  of each 
of these shapes? 
20 cm
18cm
  20 cm
22 cm
26cm
Now find the 
perimeter of these 
shapes. They are 
not drawn to 
scale.
3cm
3cm
3cm
3cm
3cm
3cm
5cm
7cm 7cm
3cm
4cm 4cm
4cm 4cm
3cm 3cm
3cm
3cm
Perimeter = 18cm Perimeter = 22cm Perimeter = 28cm
Page 5


The distance 
around the 
outside of a 
shape is called 
its perimeter.
8 cm
6 cm
8 cm
6 cm
The perimeter of the shape is 8 + 6 + 8 + 6 = 28cm.
First we need to find the length of each side by 
counting the squares.
( Each box stands for 1 cm)
What is the 
perimeter  of each 
of these shapes? 
20 cm
18cm
  20 cm
22 cm
26cm
Now find the 
perimeter of these 
shapes. They are 
not drawn to 
scale.
3cm
3cm
3cm
3cm
3cm
3cm
5cm
7cm 7cm
3cm
4cm 4cm
4cm 4cm
3cm 3cm
3cm
3cm
Perimeter = 18cm Perimeter = 22cm Perimeter = 28cm
The area of a 
shape is the 
amount of space 
inside it.
The area of the shape is 18cm
2
.
To find out how much shape is inside we can
count the squares.
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