Describing enlargements

Maths

Similarity and enlargement

Shape 3 has been enlarged about point (1, 3) with scale factor -2

Shape A has been enlarged by scale factor -2

Shape B has been enlarged by scale factor -2, about (1,3)

Which of these is an incomplete description of an enlargement?

Shape A has been enlarged by scale factor 2

Shape A has been enlarged by scale factor 2.5, centre (1, 2)

Shape A has been enlarged by scale factor 5, centre (2, 1)

Which of the following is the correct description of the below enlargement?

The object has been enlarged by scale factor -2, centre (1,0)

The object has been enlarged by scale factor 0.2, centre (1,0)

The object has been enlarged by scale factor 2, centre (1, 0)

The object has been enlarged by scale factor 2.2, centre (1,0)

A shape has been enlarged and the image has a larger area and is in a different orientation to the object. Which of the following options could describe this enlargement?

A shape has been enlarged and the image has a smaller area than the object and is in the same orientation. Which of the following options could describe this enlargement?

The object has been enlarged by scale factor -0.2, centre (1,0)

The object has been enlarged by scale factor -2, centre (1, 0)

A shape has been enlarged and the image has a smaller area than the object and has a different orientation. Which of the following options could describe this enlargement?

The image has a greater area than the object and has a different orientation

The image has a greater area than the object and has the same orientation

The image has the same area and has the same orientation as the object

The image has the same area as the object and has a different orientation

Which of the following options best describes an enlargement of scale factor -1?

Which of the following options best describes an enlargement where the scale factor is less than -1?

Which of the below images show a correct enlargement of scale factor -1, about the given point?

Which of the below images show a correct enlargement of scale factor -2, about the given point?

An enlargement only ever makes a shape bigger

Negative enlargements change the orientation of the image

The angles in the object and image are always the same

The area of the image will change if the scale factor is not -1 or 1

Which of the following statements is incorrect?

This lesson will soon be taken down.

Describing enlargements

Lesson outcome