Pythagoras’ theorem is one of the most common topics that students at key stage three and GCSE revise. The classic example questions are the ones which ask students to calculate the length of the hypotenuse and because this doesn’t require any rearrangement, most students tend to do quite well with this. It is other types of Pythagoras questions that catch people out. The resource list below links to Pythagoras worksheets, explanations and example questions. Whether you are looking to revise Pythagoras as a student or you are a teacher looking for Pythagoras resources, this dedicated page should provide you with what you are looking for.


The following list of topics are the key stage three and GCSE maths topics that are related to Pythagoras. Pythagoras can be used in a very wide range of contexts, especially in exam questions, the list below focuses on the key areas in which Pythagoras often appears.

– 3D Pythagoras and Trigonometry

– Pythagoras 

– Proof 

– Trigonometry

There are other topics in which Pythagoras’ theorem can be applied to from real life vectors to coordinates and line segments where you may be asked to calculate the length of the line segment which requires you to create a right angled triangle with the line segment as the hypotenuse. Very applied algebra and surd questions may also require knowledge of Pythagoras; these sorts of questions would appear in the GCSE higher tier paper and quite a way on through the paper indicating their level of difficulty. For many, many reasons learning the Pythagoras formula and being able to apply it to different question types will be very useful for your GCSE Maths exams.