The centre of enlargement is the point from which a shape is enlarged.

A scale factor is the multiplier between similar shapes that describes how large one shape is compared to the other.

Describing an enlargement

Maths

Checking understanding of basic transformations

Introduction to translation

Describing a translation

Translating objects

Introduction to rotations

Describing a rotation's direction and size

Understanding the centre of rotation

Rotating objects

Introduction to reflections

Describing a reflection

Reflecting objects

Introduction to enlargements

Enlarging objects

Transformed objects

Investigating transformations with Desmos

Investigating transformations with GeoGebra

Problem solving with transformations

In this unit, pupils explore the effects of different transformations and whether the transformed shape is congruent or similar to the original shape. This is built on in the future unit where pupils formalise the criteria for determining congruence in triangles and study rotational symmetry

In this unit, pupils translated and reflected simple shapes on the full coordinate grid. In this unit, these processes are formalised and rotation and enlargement are introduced

This unit introduces pupils to shape tranformations: enlargements, rotations, reflections and translations both by hand and with technology.

Transformations

__________ factor is the multiplier between similar shapes that describes how large the image is compared to the object.

The {{}} of enlargement is the point from which a shape is enlarged.

The object has been enlarged to create the image. What is the scale factor?

The object has been enlarged to create the image. What is the value of $$x$$?

Enlargement is a transformation that causes a change of __________.

Two shapes are similar if the only difference between them is

Enlarging a shape means the shape will always get smaller.

Which properties are not invariant when a shape is enlarged?

They will all become a third of the size.

Sam is going to triple the size of a rectangle. What will happen to the angles?

Lucas' rectangle has a length of 7 cm and a width of 2.6 cm. A similar rectangle has a length of 28 cm. What will its width be?

Describing an enlargement

Lesson outcome