1. • Enlargement
Enlarge an object by an integer scale factor from a centre of enlargement. Grade 3
Enlarge an object by a fractional scale factor from a centre of enlargement. Grade 4-
Describe fully an enlargement; work out a scale factor and centre of enlargement.
Grade 3+/4-
2. To work out an enlargement you will need to know:
• the scale factor
• the centre of enlargement.
6. A
B
HOW TO:
1. Mark the centre of enlargement
2. Draw lines using a ruler from the
centre of enlargement through each
of the vertices of the shape
3. Measure the distance that each of
the vertices is away from the centre
of enlargement
4. Multiply these distances by the
scale factor.
5. Your vertices for the enlarged
shape should be on the lines you
drew in the beginning
6. Draw in your shape and check that
the sides have been multiplied
correctly
7.
8. Enlarge shape A by a scale factor of 2, using
the centre of enlargement (-3,1). Label the
image B
Enlarge shape C by a scale factor of 3, using
the centre of enlargement (-5,-5). Label the
image D
A
B
C
D
9. Enlarge shape C by a scale factor of 4, using
the centre of enlargement (0,1). Label the
image D
C
Enlarge shape A by a scale factor of 2, using
the centre of enlargement (3,-3). Label the
image B
A
B
D
10. Enlarge shape E by a scale factor of 4, using
the centre of enlargement (-5,-2). Label the
image F.
E
F
Enlarge shape G by a scale factor of 3, using
the centre of enlargement -4,4). Label the
image H.
G
H
11. Enlarge shape A by a scale factor of 1/2,
using the centre of enlargement (-4,-4).
Label the image B
Enlarge shape I by a scale factor of 3, using
the centre of enlargement (4,4). Label the
image J
I
J B
A
12. Enlarge shape C by a scale factor of 1/3,
using the centre of enlargement (-4,-4).
Label the image D
Enlarge shape E by a scale factor of 1/2,
using the centre of enlargement (-5,-5).
Label the image F
D
C
E
F
13. Enlarge shape I by a scale factor of 1/2,
using the centre of enlargement (-4,-4).
Label the image J
Enlarge shape G by a scale factor of 1/5,
using the centre of enlargement (-5,5). Label
the image H
G
H
I
J
14. Describe fully the transformation that
maps red onto white
Describe fully the transformation that
maps red onto white
Enlargement with a
scale factor of 2, centre
(1,1)
Enlargement with a
scale factor of 4, centre
(-4,4)
15. Describe fully the transformation that maps
red onto white
Enlargement with a
scale factor of ½,
centre (2,0)
Describe fully the transformation that maps
red onto white Enlargement with a
scale factor of 3, centre
(3,4)
16. Enlarge shape A by a scale factor of
3, using the centre of enlargement (-
1,1). Label the image B
Enlarge shape C by a scale factor
of 2/3, using the centre of
enlargement (-5,-5). Label the
image D
Describe fully the transformation
that maps red onto white
A
C
17. Enlarge shape A by a scale factor of
3, using the centre of enlargement (-
1,1). Label the image B
A
B
Enlarge shape C by a scale factor
of 2/3, using the centre of
enlargement (-5,-5). Label the
image D
D
C
Describe fully the transformation
that maps red onto white
Enlargement
with a scale
factor of 3,
centre (-5, -
0.5)
