1. goteachmaths.co.uk Negative Enlargements – Complete Lesson
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2. Negative Enlargements
01 December December 2018
Negative Enlargements

3. 3 2 1 2 6 3 4 6 Enlarge shape A by a scale factor of -2 label it A’. Ax x 3 A’ 4
Count the horizontal and
vertical distance to each vertex. 6
Reverse and multiply each
distance by 2 to plot the
new vertex. x
Join the points, label the shape.
& check

4. 3 2 1 2 4 6 Enlarge shape A by a scale factor of -2 label it A’. A x x
Count the horizontal and
vertical distance to each vertex.
No animations. 6
Reverse and multiply each
distance by 2 to plot the
new vertex. x
Join the points, label the shape.
& check

5. 1 2 6 1 3 2 6 3 Enlarge shape B by a scale factor of -3 label it B’. Bx x 2 B’ 6
Count the horizontal and
vertical distance to each vertex.
Reverse and multiply each
distance by 2 to plot the
new vertex. x
Join the points, label the shape.
& check 3

6. 1 2 1 3 6 3 Enlarge shape B by a scale factor of -3 label it B’. B x x
Count the horizontal and
vertical distance to each vertex.
No animations.
Reverse and multiply each
distance by 2 to plot the
new vertex. x
Join the points, label the shape.
& check 3

7. 1) Count the horizontal and
vertical distance to each vertex.
Reverse and multiply each
distance to plot the new vertex.
Join the points, label the shape.
& check
1) Count the horizontal and
vertical distance to each vertex.
Reverse and multiply each
distance to plot the new vertex.
Join the points, label the shape.
& check
1) Count the horizontal and
vertical distance to each vertex.
Reverse and multiply each
distance to plot the new vertex.
Join the points, label the shape.
& check
Handouts for students to complete alongside demonstration.

8. Centre of Enlargement: (3,3) Scale factor: -2

10. ½ Answers Scale factor: -2 Centre of Enlargement: (3,3)

11. Answers Scale factor: -2 Centre of Enlargement: (3,3) Scale factor: -2

12. Check your success! I can enlarge a shape by a negative scale factor.
I can enlarge a shape by a negative scale factor on a coordinate grid.
I can enlarge a shape by a negative fractional scale factor.

13. Check your success! I can enlarge a shape by a negative scale factor.
I can enlarge a shape by a negative scale factor on a coordinate grid.
I can enlarge a shape by a negative fractional scale factor.
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