Enlargement is a transformation that causes a change of size.

Two shapes are similar if the only difference between them is their size. Their side lengths are in the same proportions.

Introduction to enlargements

Maths

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

Transformations

__________ is a transformation that causes a change of size.

Two shapes are {{}} if the only difference between them is their size.

Enlarging a shape means the shape will always get bigger.

Which property is invariant when a shape is enlarged?

Sofia is going to halve the size of a rectangle. What will happen to the angles?

Aisha's rectangle has a length of 6 cm and a width of 1.3 cm. A similar rectangle has a length of 18 cm. What will its width be?

The object is what we call a shape after it has been transformed.

Which property is not invariant when a shape is translated?

Which properties are not invariant when a shape is rotated?

Which properties are not invariant when a shape is reflected?

Match each number on the left with its multiple on the right. There is only one possible solution.

Which of these is the correct location of the reflected image of vertex A?

This lesson will soon be taken down.

Introduction to enlargements

Lesson outcome