This key facts covers The Formula within Pythagoras' Theorem for GCSE Mathematics. Revise Pythagoras' Theorem in Geometry & Measures for GCSE Mathematics with 17 exam-style questions and 3 flashcards. This topic appears regularly enough that it should still be part of a steady revision cycle. It is section 2 of 4 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 2 of 4
Practice
17 questions
Recall
3 flashcards
The Formula
Where c is the hypotenuse (the longest side, opposite the right angle)
To find the hypotenuse: c = √(a² + b²)
To find a shorter side: a = √(c² - b²)
Keep building this topic
Read this section alongside the surrounding pages in Pythagoras' Theorem. That gives you the full topic sequence instead of a single isolated revision point.
Practice Questions for Pythagoras' Theorem
In a right-angled triangle with legs a and b and hypotenuse c, which formula is Pythagoras' theorem?
A triangle has sides of length 5 cm, 12 cm, and 13 cm. Explain how you can tell, without measuring any angles, whether this triangle contains a right angle.
Quick Recall Flashcards
17 questions on Pythagoras' Theorem — practise free
Instant marking, adaptive difficulty, and 3 spaced repetition flashcards. Free until your GCSEs.
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