### Key Stage 3 Maths - Lesson Objectives, Keywords and Resources - Year 8 - Shape, Space and Measures

# Enlargements

## Lesson Objectives

To be able to:

- Recognise that enlargements preserve angle but not length, and understand the implications of enlargement for perimeter.
- Identify the scale factor of an enlargement as the ratio of the lengths of any two corresponding line segments.
- Enlarge 2-D shapes, given a centre of enlargement and a negative whole-number scale factor.

## Keywords:

Object, image, enlarge, centre of enlargement, scale factor, negative enlargement

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