Enlargement using a negative scale factor
I can perform a given enlargement on an object.
Enlargement using a negative scale factor
I can perform a given enlargement on an object.
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- Each length in the shape is multiplied by the scale factor.
- Each vertex in the object is a given distance from the centre of enlargement.
- This distance is also multiplied by the scale factor to give the distance of the image's vertex.
- A negative scale factor produces an image that is the other side of centre of enlargement.
- To enlarge, you need the centre of enlargement and a scale factor.
Keywords
Transformation - A transformation is a process that may change the size, orientation or position of a shape.
Enlargement - Enlargement is a transformation that causes a change of size.
Scale factor - A scale factor is the multiplier between similar shapes that describes how large one shape is compared to the other.
Centre of enlargement - The centre of enlargement is the point from which a shape is enlarged.
Common misconception
Pupils may think that a negative scale factor creates a smaller image than the object.
Remind them that the absolute value will be less than 1 and greater than 0 to create a smaller image. Whether the scale factor is positive or negative does not affect this.
To help you plan your year 10 maths lesson on: Enlargement using a negative scale factor, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 10 maths lesson on: Enlargement using a negative scale factor, download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
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