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# Pythagoras' Theorem
- URL: https://www.esheets.io/pythagoras-theorem/
- Published: 2026-07-09T19:49:42.000Z
- Updated: 2026-07-09T19:49:42.000Z
- Author: Richard Linnington
- Tags: Maths, Geometry and Shape, Topics

Pythagoras' theorem is used to find missing side lengths in right-angled triangles. By identifying the hypotenuse and using the relationship between the three sides, you can solve a wide range of geometry and problem-solving questions.

Explore our Pythagoras worksheets, guides and interactive resources to practise finding missing lengths, using the theorem correctly and solving GCSE maths problems involving right-angled triangles.

- [Perigal's dissection interactive tool](https://www.esheets.io/perigals-dissection/)
- [Finding the hypotenuse](https://www.esheets.io/finding-the-hypotenuse-with-pythagoras-theorem/)
- [Finding a shorter side](https://www.esheets.io/finding-shorter-sides-with-pythagoras-theorem/)
- [Mixed questions](https://www.esheets.io/pythagoras-theorem-mixed-questions/)
- [Pythagoras in simplified surd form](https://www.esheets.io/pythagoras-in-surd-form/)
- [Pythagoras and isosceles triangles](https://www.esheets.io/pythagoras-and-isosceles-triangles/)