1. ENLARGEMENTS INTRODUCTION ENLARGEMENT Makes a shape bigger or smaller
Two things you need to know
1) Scale factor
How many times bigger or smaller
2) Centre of enlargement
The point where you enlarge from. 1

2. IMAGE ENLARGEMENT OF SHAPES EXAMPLES IMAGE 1) 2) 3 2 2 2 3 6 3 1 6 9 4
Multiply all lengths by 2
Multiply all lengths by 3
Enlarge this shape by scale factor 2.
Enlarge this shape by scale factor 3. 2

3. ENLARGEMENT OF SHAPES 1) 2) 3) 4) 5) 6) 3

4. ENLARGEMENT OF SHAPES EXAMPLES 3) 4)
Centre of enlargement 3) 4) 3 1 1 1 3 3 12 4 4 12 12 4 10 4 \ 5 2 4 8 4 2 4 2
Centre of enlargement
Multiply all lengths by 2
Multiply all lengths by 4
Enlarge this shape by scale factor 2 from the centre of enlargement.
Enlarge this shape by scale factor 4 from the centre of enlargement 4

5. Describing ENLARGEMENTS
EXAMPLES 7) 8) B A A 6 3
Centre of enlargement 9 B 3
Centre of enlargement
Describe the transformation fully that takes shape A to shape B.
Describe the transformation fully that takes shape A to shape B.
Enlargement,
Enlargement,
by scale factor ,
by scale factor 2,
from centre (-6,-1)
from centre (7,-4) 5

6. Face 2 Worksheet

7. Match the enlargement from A to B with it’s scale factor.
ENLARGEMENT OF SHAPES
Match the enlargement from A to B with it’s scale factor. 1) 2) 3)
Scale factor 2 B A
Scale factor B A B A
Scale factor 8 4) 5) 6)
Scale factor A A B
Scale factor 4 B A B
Scale factor 7