Maths

Y9 Maths

Key Stage 3

Year 9

Similarity and enlargement

In this lesson, we will learn what is meant by enlargement and how to enlarge shapes by an integer scale factor. It would be helpful if you could have squared paper and a ruler for this lesson.

Enlargement by an integer scale factor

In this lesson, we will learn how to enlarge shapes by a non-integer scale factor. It would be helpful if you could have squared paper and a ruler for this lesson.

Enlargement by a non-integer scale factor

In this lesson, we will learn how to enlarge a shape from a given point. It would be helpful if you could have squared paper and a ruler for this lesson.

Enlargement from a given point

In this lesson, we will learn how to enlarge a shape by a negative scale factor. It would be helpful if you could have squared paper and a ruler for this lesson.

Enlargement by a negative scale factor

In this lesson, we will learn how to describe an enlargement using the terms centre of enlargement and scale factor.

Describing enlargements

In this lesson, we will learn to define similarity and apply your understanding to similar triangles. We will also draw an enlargement.

Similar triangles

In this lesson, we will apply your understanding of similarity to nested triangles to calculate missing sides and angles.

Nested triangles

In this lesson, we will identify similar shapes and subsequently work out areas of similar shapes using our knowledge of scale factors.

Key Stage 3, Maths, Similarity and enlargement