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Circle theorems: angles
Apply circle theorems about angles at the centre and circumference, in a semicircle and in cyclic quadrilaterals, giving reasons.
⏱ 20 min❓ 10 questions
What you'll be able to do
- ✔I can use the language of arcs, chords and subtended angles
- ✔I can apply the angle at the centre, same segment and semicircle theorems with reasons
- ✔I can use the properties of cyclic quadrilaterals to find unknown angles
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:
- 🔢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: AC9M10SP01