These lessons will involve the students in investigating and understanding:
• Enlargements paying attention to
o Centre of enlargement , scale factor k, k>1, 0<k<1 ,k∈Q
Mathsisfun Interactive Resizing
o How to draw an enlargement given a scale factor when the centre of enlargement is outside the figure to be enlarged
GCSE Maths Transformations Revision - Transformations | S-cool, the revision website
o How to draw an enlargement given a scale factor when the centre of enlargement is inside the figure to be enlarged
o How to draw an enlargement given a scale factor when the centre of enlargement is a vertex of the figure to be enlarged or is a point on the figure
BBC - GCSE Bitesize: Enlargements
o How to find the scale factor
BBC - KS3 Bitesize Maths - More on transformations : Revision, Page 3
• That when a figure is enlarged by a scale factor k , the area of the image figure is increased by a factor k2
• How to solve problems involving enlargements
Worksheet
Enlargement on a grid. A fun Shape maths game about Transformations
Khan
Project Maths
Teaching and learning plan on enlargements - developed by teachers