The distance around the outside of a shape is called the 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 he length of each side by
counting the squares.
What is the perimeter of each of these shapes? Your teacher will give you copy of the worksheet.
18cm
18cm
18cm
22cm
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 18cm2.
To find out how much shape is inside we can
count the squares.
What is the area of each of these shapes? Your teacher will give you copy of the worksheet.
12cm2
26cm2
26cm2
To find the area of
an irregular shape you first count the full squares inside it.
This is an irregular shape. This means that the sides aren’t straight.
You then count all the other squares which have more than half the area covered.
The area of the shape is 60cm2.
What is the area of each of these shapes? Your teacher will give you copy of the worksheet.
24cm2
25cm2
22cm2
35cm2
Counting each square can take a long time. Does anyone know a quicker way?
The area of the shape is 48cm2.
The rectangle is made of 6 rows of 8 squares.
To work out the number of squares
we times 6 by 8.
What is the area of each of these shapes? Your teacher will give you copy of the worksheet.
20cm2
18cm2
14cm2
30cm2
22cm2
We can work out the area of a rectangle
without the grid.
length
width
Area = length x width
Now work out the area of these rectangles.
They are not drawn to scale.
36cm2
35cm2
20cm2
25cm2
4cm
9cm
7cm
5cm
5cm
4cm
2cm
12.5cm
A shape that is made from other shapes is known as a composite shape.
To find the area of this shape we have to split it up into two rectangles.
10cm
8cm
8cm
2cm
4cm
4cm
Area =
4 x 10
40cm2
Area =
4 x 8
32cm2
Total area = 40 + 32 = 72 cm2
Find the area and perimeter of each of these shapes? Your teacher will give you copy of the worksheet.
9cm
5cm
5cm
2cm
4cm
5cm
4cm
2cm
11cm
7cm
4cm
3cm
3cm
3cm
7cm
6cm
6cm
11cm
2cm
4cm
5cm
4cm
9cm
5cm
5cm
2cm
4cm
5cm
4cm
2cm
Area =
5 x 9
45cm2
Area =
4 x 5
20cm2
Total area = 45 + 20 = 65 cm2
Perimeter = 36 cm
6cm
6cm
11cm
2cm
4cm
5cm
Area =
2 x 5
10cm2
Area =
6 x 6
36cm2
Total area = 10 + 36 = 46 cm2
Perimeter = 34 cm
11cm
7cm
4cm
3cm
3cm
3cm
7cm
Total area = 28 + 16 + 21 = 65 cm2
Perimeter = 42 cm
Area =
4 x 7
Area =
4 x 4
4cm
Area =
3 x 7
21cm2
28cm2
16cm2
There is another way of doing this question.
11cm
7cm
4cm
3cm
3cm
3cm
7cm
Total area = 77 – 12 = 65 cm2
Perimeter = 42 cm
Area =
7 x 11
Area =
3 x 4
4cm
77cm2
12cm2
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9cm
5cm
5cm
2cm
4cm
5cm
4cm
2cm
11cm
7cm
4cm
3cm
3cm
4cm
3cm
7cm
6cm
6cm
11cm
2cm
4cm
5cm
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Review
What is the area of the moon?
_____________________cm2
What is the area of the rectangle?
_____________________cm2
What is the perimeter of the rectangle?
_____________________cm
Name:____________________
4cm
4cm
4cm
6cm
8cm
2cm
What is the area of the compound shape?
_____________________cm2
What is the perimeter of the compound shape?
_____________________cm
What is the area of the house?
_____________________cm2