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Enlargements and scale factors

Enlarge and reduce shapes by a scale factor, identify what changes and what stays the same, and use scale factors to find unknown lengths.

⏱ 17 min❓ 11 questions

What you'll be able to do

  • ✔I can find a scale factor by comparing matching lengths
  • ✔I can enlarge or reduce a shape from a centre of enlargement
  • ✔I can explain that angles stay the same while lengths are multiplied by the scale factor

How this works

  1. 1Read the short explanations first — they teach you what you need before each question.
  2. 2Answer each question, then tap Check. A right answer moves you on automatically; if it's wrong, you'll see a friendly explanation of why.
  3. 3Finish all 3 steps to see your score — sign in and subscribe to unlock the full lesson and save it.

What's inside

11 questions and 1 quick teaching card, including:

  • 🔢Number answer — Work out the answer and type the number.

👪Grown-up tip: sit alongside younger learners for the first few lessons. Read the questions together and chat about the explanations — that's where the real learning sticks.

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Curriculum: AC9M9SP02