goteachmaths.co.uk Negative Enlargements – Complete Lesson Delete unwanted slides. To print handouts: File>Print>Print Current Slide

Negative Enlargements 01 December 201801 December 2018 Negative Enlargements

3 2 1 2 6 3 4 6 Enlarge shape A by a scale factor of -2 label it A’. A x 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

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

1 2 6 1 3 2 6 3 Enlarge shape B by a scale factor of -3 label it B’. B x 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

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

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.

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

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

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

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.

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. Effort this lesson?