Describe an enlargement with a negative scale factor

Describe an enlargement with a negative scale factor

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Lesson details

Key learning points

  1. In this lesson, we will learn how to describe enlargements with a negative scale factor.

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3 Questions

Q1.
An enlargement with a negative scale factor will invert (flip upside down) the shape?
An image in a quiz
Correct answer: A
B
C
Q2.
An enlargement with a negative scale factor will make the shape smaller?
An image in a quiz
A
Correct answer: B
C
Q3.
What scale factor does this enlargement from Shape A to shape B show?
An image in a quiz
Correct answer: -2
-3
2
3

3 Questions

Q1.
Shape A maps to shape B in an enlargement, calculate the scale factor.
An image in a quiz
-1
Correct answer: -2
1
2
Q2.
Why have corresponding vertices been joined up in shapes A and B with straight lines in this enlargement?
An image in a quiz
They do not do anything useful.
They get extra marks in a test.
Correct answer: They help with finding the centre of enlargement.
Q3.
The point at (-2,-1) is enlarged by a scale factor of -2 from the centre of enlargement at (0,0). What will the new coordinate of the point be?
An image in a quiz
(-4,-2)
(0,0)
(2,1)
Correct answer: (4,2)

Lesson appears in

UnitMaths / Enlargement and Similarity