Here’s a few videos on how to work with scale factors, that I hope might be useful. They are becoming a little more popular on GCSE mathematics as you need to demonstrate a clear, logical method. However the questions can a be a little tricky:

- You need to remember that the scale factor is usually calculated as a linear measurement
- Once you have calculated the scale factor – usually called ‘k’ – you might need to square or cube to answer the question
- Make sure that you’re answer seems right … is the new area smaller? bigger? It can be quite easy to work out the value of k incorrectly.
- If the answer doesn’t seem right revisit your calculation to find out k – and swap the numbers around.

If you’d like to ask for any more detail, or you’re not sure about anything, please do ask a question in the comments section.

All best with your studies

Watch on YouTube

How to work with scale factor – volume of mathematically similar shapes

How to work with scale factor – mass of mathematically similar shapes

How to work with scale factor – area of mathematically similar shapes

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