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Algorithms for constructions
Follow, test and refine step-by-step compass-and-ruler algorithms for bisecting angles and intervals and constructing perpendiculars.
⏱ 18 min❓ 10 questions
What you'll be able to do
- ✔I can follow an algorithm to bisect an angle and to construct a perpendicular bisector
- ✔I can test a construction by measuring and explain why it works
- ✔I can spot and fix a step in a construction algorithm that fails
How this works
- 1Read the short explanations first — they teach you what you need before each question.
- 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.
- 3Finish all 3 steps to see your score — sign in and subscribe to unlock the full lesson and save it.
What's inside
10 questions and 1 quick teaching card, including:
- ↕️Put in order — Use the up and down arrows to sort the steps.
👪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: AC9M9SP03