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Perimeter and Area (Year 4)
Do you know what would be a suitable unit to measure the area of a classroom?

Perimeter and Area (Year 4)

Year 4 perimeter and area introduce measuring the length around shapes and the space inside. Pupils practise solving real-world problems using these important geometry skills.

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Fascinating Fact:

The Great Pyramid of Giza has a square base with a perimeter of over 900 metres.

In KS2 Maths, Year 4 pupils build confidence with perimeter and area. These topics connect maths to real life, from fencing gardens to tiling floors or designing sports pitches.

  • Perimeter: The total distance around the outside of a shape.
  • Area: The amount of space inside a flat, two-dimensional shape.
  • Square unit: A standard measurement used for area, such as square centimetres (cm²).
How do you find the perimeter of a shape?

The perimeter is found by adding the lengths of all the sides of a shape. For rectangles, you add twice the length and twice the width.

How do you work out the area of a rectangle?

The area of a rectangle is found by multiplying its length by its width. The answer is written in square units, such as cm² or m².

Why is learning about perimeter and area important?

Understanding perimeter and area is important for real-life tasks, such as building fences, laying carpets, painting walls, or designing playgrounds and gardens.

1 .
A square has a perimeter of 32cm. How long are the sides?
4cm
8cm
10cm
16cm
As a square has four equal sides, we divide by 4 to get the answer
2 .
What is area?
The distance around the edge of a 2D shape
The distance across a 2D shape
The size of the surface of a 2D shape
The distance around the edge of a 3D shape
Area is measured in square mm cm m or km
3 .
What is a perimeter?
The distance around the edge of a shape
The distance across a shape
The size of the surface of a 2D shape
The size of the surface of a 3D shape
To calculate the perimeter of a 2D shape, add together the length of each side
4 .
Which would be a suitable unit to measure the area of a classroom?
Square metres
Square millimetres
Square centimetres
Square kilograms
Millimetres and centimetres would be way too small and kilograms measure weight!
5 .
What is useful to work out the area of a small 2D shape?
Tracing paper
Measuring jug
Metre stick
Squared paper
Squared paper helps to work out the area of irregular shapes too
6 .
Which would be a good estimate of the area of a small notebook?
1,000cm2
5cm2
26cm2
500cm2
This would be a very small notebook measuring 4cm x 6.5cm
7 .
What is the perimeter of a rectangle 5cm x 9cm?
14cm
20cm
28cm
45cm
A rectangle has two sides of equal length and two more side with equal length. So the answer is:
(2 x 5) + (2 x 9) which is
10 + 18 = 28
8 .
Which is a good estimate of the perimeter of a mobile 'phone?
100cm
34cm
2m
25mm
100cm = 1m That's way too big for a 'phone!
9 .
What is the perimeter of a 6cm square?
6cm
12cm
18cm
24cm
A square has four equal sides, therefore the perimeter will be 4 x 6 = 24
10 .
How is square centimetre usually written?
Cm sq
Sq cm
cm2
2cm
Cubed cm are written as cm3
You can find more about this topic by visiting BBC Bitesize - How to work out an area

Author:  Amanda Swift (Primary School Teacher & Educational Content Developer)

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