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Enlargements

Enlargements. (including negatives). Starter. In the back of your books, describe how to rotate an object on a grid, using tracing paper Include a brief example if you have time. Enlargements including Negatives. Enlargement means to change the size of an object, bigger or smaller

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Enlargements

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  1. Enlargements (including negatives)

  2. Starter • In the back of your books, describe how to rotate an object on a grid, using tracing paper • Include a brief example if you have time

  3. Enlargements including Negatives • Enlargement means to change the size of an object, bigger or smaller • When enlarged, the object’s ‘features’ should stay the same • For example if we double the size of the object, then every aspect of it should double in size

  4. Enlargements including Negatives • Enlargements is used a lot in photography • For example on a computer you can enlarge photos you have taken • Enlargements can also be used with astronomy, by taking pictures of distant galaxies and then enlarging them

  5. Enlargements including Negatives Enlarge the Rectangle with a scale factor of 2, using (0,0) as the centre of enlargement y 7 6 5 4 3 2 A 1 0 0 1 2 3 4 5 6 7 x

  6. Enlargements including Negatives Enlarge the Shape with Scale Factor 3, with a centre of (4,0) y 7 6 5 4 3 2 B 1 0 0 1 2 3 4 5 6 7 x

  7. y 7 6 5 4 3 2 1 0 0 1 2 3 4 5 6 7 x Enlargements including Negatives Enlarge the object shown using a scale factor of 1/2. Use the point (1,6) as the centre of enlargement C

  8. y 7 6 5 4 3 2 1 0 0 1 2 3 4 5 6 7 x Enlargements including Negatives Scale Factor  ‘- 2’ Centre (5,5) • Negative Enlargement With negative enlargement, the same system applies, but the directions are reversed… D

  9. Summary • We have learnt how to enlarge objects • We have learnt what ‘scale factor’ is • We have also looked at enlarging objects from different ‘centres’

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