**A resource that uses interactive Excel spreadsheets to help pupils investigate a geometrical proof and an algebraic proof of Pythagoras’ theorem.**The interactive spreadsheets show the stages in proving Pythagoras’ theorem. Teachers can use these to generate discussion at each step and encourage pupils to construct a proof for themselves.

Year 9 Objectives covered:

- Investigate Pythagoras' theorem, using a variety of media, through its historical and cultural roots, including 'picture' proofs

- Distinguish between practical demonstration and proof in a geometrical context

- Whole class teaching
- Paired work
- Discussion

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