A linear scale factor is a number that shows how much a shape has been enlarged or reduced. It's used when you change the size of a shape, like making a small picture bigger or a large object smaller, while keeping everything in the same proportion.
If the linear scale factor is more than 1, the shape gets bigger, and if it's between 0 and 1, the shape gets smaller. For example, if the linear scale factor is 2, each side of the shape is twice as long. If it is 0.5, each side is half as long.
Understanding scale factors is important for solving problems about similar shapes in geometry.
Examiner-written GCSE Maths revision resources that improve your grades 2x
- Written by expert teachers and examiners
- Aligned to exam specifications
- Everything you need to know, and nothing you don’t
Share this article
written revision resources that improve your