School level

# 27th April

## 27th April: Enlargements

Enlargements is on the leaving certificate maths syllabus for foundation, ordinary and higher level students.

### Learning Outcomes

2.4 Transformation geometry, enlargements
– investigate enlargements and their effect on area, paying attention to
• centre of enlargement
• scale factor k where 0<k<1, k>1 k Î Q
– solve problems involving enlargements

Introduction
Explanatory Videos
Geogebra Files and Associated Worksheets
SEC Exam Questions

### Enlargements Introduction

Short introduction to enlargements (dilations)

SC Mathematics

#### How it maps to the curriculum

SC
Mathematics

Strand: 2. Geometry & Trigonometry

Strand unit: 4. Transformation Geometry, Enlargements

Suggestions for use: Can be used at the very start of introducing the topic of enlargements

Asset type: Document
Language: English
Special Needs:

### Enlargements Teaching & Learning Plan

Teaching & Learning Plan developed by teachers

SC Mathematics

#### How it maps to the curriculum

SC
Mathematics

Strand: 2. Geometry & Trigonometry

Strand unit: 4. Transformation Geometry, Enlargements

Suggestions for use: Students need paper, scissors and glue

Asset type: Document
Language: English
Special Needs:

### Enlargements - Scale Factor (k)

https://www.youtube.com/watch?v=2OweFAiqNwA Added: 25 Jul 2018 Contributor: UCD MSC Resource type: Audio / Video

Video describes what a scale factor is in terms of transformation and demonstrates how to calculate the scale factor in numerous different examples.

SC Mathematics

#### How it maps to the curriculum

SC
Mathematics

Strand: 2. Geometry & Trigonometry

Strand unit: 4. Transformation Geometry, Enlargements

Asset type: Video
Language: English
Special Needs:

### Centre of Enlargement

https://www.youtube.com/watch?v=nSEJrvGLo4M Added: 25 Jul 2018 Contributor: UCD MSC Resource type: Audio / Video

Video demonstrates how students can find the centre of enlargement by drawing lines through the corresponding vertices of the object and the image.

SC Mathematics

#### How it maps to the curriculum

SC
Mathematics

Strand: 2. Geometry & Trigonometry

Strand unit: 4. Transformation Geometry, Enlargements

Asset type: Video
Language: English
Special Needs:

### Scale Factor and Area

https://www.youtube.com/watch?v=EHBkcLf6c2w Added: 25 Jul 2018 Contributor: UCD MSC Resource type: Audio / Video

Video explains the property of enlargement known as 'Scale Factor and Area' and illustrates how to solve certain mathematical questions relating to the property. Two worked examples provided.

SC Mathematics

#### How it maps to the curriculum

SC
Mathematics

Strand: 2. Geometry & Trigonometry

Strand unit: 4. Transformation Geometry, Enlargements

Suggestions for use: Students could attempt the question prior to watching the video and then use the video as a self-assessment tool.

Asset type: Video
Language: English
Special Needs:

### Transformations - Leaving Certificate

https://www.scoilnet.ie/pdst/maths/...metry-trigonometry/transformations/ Added: 09 Nov 2019 Contributor: PDST Resource type: Guide/notes / Simulation

Geogebra interactive files and student worksheets demonstrating transformations including translations, reflections and enlargements.

SC Mathematics

#### How it maps to the curriculum

SC
Mathematics

Strand: 2. Geometry & Trigonometry

Strand unit: 4. Transformation Geometry, Enlargements

Asset type: Online Resource
Language: English
Special Needs:

### 2017 FL Q8

SEC Enlargement question

SC Mathematics

#### How it maps to the curriculum

SC
Mathematics

Strand: 2. Geometry & Trigonometry

Strand unit: 4. Transformation Geometry, Enlargements

Asset type: Document
Language: English
Special Needs:

### 2018 FL Q9

SEC Enlargement question

SC Mathematics

#### How it maps to the curriculum

SC
Mathematics

Strand: 2. Geometry & Trigonometry

Strand unit: 4. Transformation Geometry, Enlargements

Asset type: Document
Language: English
Special Needs:

### 2015 OL Q7

SEC Enlargement question

SC Mathematics

#### How it maps to the curriculum

SC
Mathematics

Strand: 2. Geometry & Trigonometry

Strand unit: 4. Transformation Geometry, Enlargements

Asset type: Document
Language: English
Special Needs:

### 2017 OL Q8

SEC Enlargement question

SC Mathematics

#### How it maps to the curriculum

SC
Mathematics

Strand: 2. Geometry & Trigonometry

Strand unit: 4. Transformation Geometry, Enlargements

Asset type: Document
Language: English
Special Needs:

### 2011 HL Q4

SEC Enlargement question

SC Mathematics

#### How it maps to the curriculum

SC
Mathematics

Strand: 2. Geometry & Trigonometry

Strand unit: 4. Transformation Geometry, Enlargements

Asset type: Document
Language: English
Special Needs:

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