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Theorem - GCSE Maths Definition

Reviewed by: Dan Finlay

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A theorem is a mathematical statement that has been proven using logical reasoning and existing mathematical facts. In GCSE Mathematics, you will encounter theorems that help solve problems; Pythagoras' theorem is very common and concerns the relationship between the three sides of a right-angled triangle. You are not usually required to prove a theorem, as this has already been done in the past. However, you will be required to use theorems to solve problems - there are several circle theorems you need to know that enable you to solve problems regarding angles and shapes involving circles.

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Dan Finlay

Reviewer: Dan Finlay

Expertise: Maths Subject Lead

Dan graduated from the University of Oxford with a First class degree in mathematics. As well as teaching maths for over 8 years, Dan has marked a range of exams for Edexcel, tutored students and taught A Level Accounting. Dan has a keen interest in statistics and probability and their real-life applications.

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