# Surface area of cuboids

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## Lesson details

### Key learning points

1. In this lesson, we will learn how to calculate the surface area of cuboids.

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## Video

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## Worksheet

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## Starter quiz

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### 5 Questions

Q1.
What is the best mathematical definition of a conjecture?
A fact
A proof
A statement that is always true
Correct answer: A statement which we think is true but is not yet proven
Q2.
What is the surface area of this 1cm unit cube?
3 centimetres squared
4 centimetres squared
8 centimetres squared
Q3.
Two 1cm unit cubes have been combined to form the solid shape below. What is the surface area?
12 centimetres squared
18 centimetres squared
6 centimetres squared
Q4.
The pattern is continued so that we have 3 unit cubes stuck together as a stick. What is the surface area?
18 centimetres squared
20 centimetres squared
7 centimetres squared
Q5.
The pattern is continued so that we have 13 unit cubes stuck together as a stick. Which calculation successfully works out the surface area?
4 x 13 - 2
Correct answer: 4 x 13 + 2
6 x 13
6 x 13 -2

## Exit quiz

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### 6 Questions

Q1.
This net has been drawn on a centimetre grid. What is the surface area of this cuboid?
216 centimetres squared
54 centimetres squared
96 centimetres squared
Q2.
This cuboid is formed by 1cm unit cubes. What is the surface area of this shape?
16 centimetres squared
20 centimetres squared
80 centimetres squared
Q3.
Xavier says to find the surface area of a cuboid you can find the area of the front, side and base, add them together and double it. Do you agree?
No, you cannot work out the surface area of a cuboid like that.
Correct answer: Yes, that is one way you could work out the surface area of a cuboid.
Q4.
Find the surface area of a cube with edges of length 2m
12 metres squared
4 metres squred
8 metres squared
Q5.
Find the surface area of a 1.5m x 2m x 6m cuboid
18 metres squared
24 metres squared