What is a scale factor?

Enlarging a shape by a positive scale factor means changing the size of a shape by a scale factor from a particular point, which is called the centre of enlargement

If you enlarge it by a a positive number less than 1, the shape will get smaller.
If you enlarge it by a positive number greater than 1, the shape will get bigger.

For example

If you start with a square whose lengths are all 2 units long, and you enlarge it by scale factor 3, then the sides will now all be 6 units long (2 x 3 = 6).

If you start with a square whose lengths are all 2 units long, and you enlarge it by scale factor 1.5, then the sides will now all be 3 units long (2 x 1.5 = 3).

Nothing in this section yet. Why not help us get started?

Related Topics

Requires a knowledge of…

After this move on to…

Related Questions

• 1
Vote
4

What is a coordinate grid?

By Ryan McGuire on the 10th of January, 2013

• 1
Vote
3

What is the general form for a quadratic equation?

By Filsan on the 10th of January, 2013

• 1
Vote
3

What is the equation of a straight line graph?

By Filsan on the 10th of January, 2013

• 0
4

How do I find 15% of a value?

By Verity Painter on the 8th of January, 2013

• 0
1

What does write the terms of a sequence mean?

By Filsan on the 6th of December, 2012

• 0
1

what is a data collection sheet?

By Lee Mansfield on the 11th of June, 2012

• 2
4

what is a questionnaire?

By Lee Mansfield on the 11th of June, 2012

• 0
2