# Enlargement

## Lesson details

### Key learning points

1. In this lesson, we will learn how ratio relates to enlargements of shapes.

### Licence

This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.

## Video

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## Worksheet

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## Starter quiz

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### 5 Questions

Q1.
I have 5 yellow counters and 7 green counters. What fraction of the counters are green?
5/12
5/7
7/5
Q2.
I have a bag of pink and brown cubes. 5/11 of the cubes are pink. What is the ratio of pink cubes:brown cubes?
11:5
5:11
6:5
Q3.
5 litres of red paint and 8 litres of yellow paint are mixed to make orange. Which of these would give the same shade of paint?
2 litres red, 5 litres yellow
Correct answer: 50 litres red, 80 litres yellow
8 litres red, 11 litres yellow
Q4.
Squash and water are mixed in the ratio 2:5. Which other drink will taste the same?
20:55
4:8
9:15
Q5.
Purple paint is made by mixing blue paint and red paint in the ratio 4:3. How much blue paint is needed to mix with 24L of red paint?
24L
6L
8L

## Exit quiz

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### 5 Questions

Q1.
Fill in the gap: the diagram shows a triangle that has been _________ by a scale factor of 3.5.
bigger
proportionality
ratio
Q2.
Fill in the gap: the ratio between the side lengths AB and BC is 2 : ____.
10.5
2
ratio
Q3.
Fill in the gaps: The _______ between the side length DE and EF is also 2 : ___.
proportionality, 10.5
proportionality, 3
ratio, 10.5
Q4.
Fill in the gap: The constant of _________ between the two triangles is 3.5.
bigger
enlargement