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E nlargement

In this lesson, we explore the concept of enlargement in geometry, focusing on enlarging shapes from a given point. We define key terms such as scale factor and demonstrate how to apply it to various shapes. You will learn how to enlarge a rectangle, kite, and triangle by distinct scale factors, such as 2, 0.5, and 3. By using counting squares, we simplify the process of enlarging shapes while maintaining their proportions. After grasping the core concepts, you’ll have the opportunity to practice and extend your knowledge through additional exercises.

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E nlargement

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Presentation Transcript

  1. Enlargement Recap over enlargement of shapes and key phrases(level 5) Understand how to enlarge a shape from a given point(level 6)

  2. What we’ve covered • What is enlargement? • What does scale factor mean?

  3. Look at your 2 questions in pairs • Enlarge the first by scale factor 2 • This means double the length • Enlarge the second by scale factor 0.5 • This means half the length

  4. Marking • Swap with a partner and if possible give them • EBI • WWW

  5. To enlarge the rectangle by scale factorx2 from the point shown. B / A/ Image D/ C/ A B Object C D Centre of Enlargement Simply Count Squares Enlarging with a given point 1. If a shape is being enlarged by scale factor 2 the shape has to be twice the size 2.It also has to be twice as far away from the centre of enlargement.

  6. Enlargements from a Given Point Centre of Enlargement To enlarge the kite by scale factorx3 from the point shown. B A B/ C Object D C/ A/ Image Simply count Squares D/ X3 1. If a shape is being enlarged by scale factor 3 the shape has to be three times the size 2.It also has to be three times as far away from the centre of enlargement.

  7. Enlargements from a Given Point To enlarge the triangle by scale factor x4 from the point shown. B C Object A Centre of Enlargement

  8. Now try • Work on the sheet provided. • What do you need to remember? • If you are happy move onto the extension

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