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Right-angled triangles and the hypotenuse

Right-angled triangles and the hypotenuse

Labelled right-angled triangle with sides a and b as shorter sides and side c as the hypotenuse opposite the right angle

Pythagoras' theorem only works in a right-angled triangle. The hypotenuse is opposite the right angle. It is always the longest side.

Pythagoras Lesson

  1. IGCSE
  2. /Maths
  3. /Pythagoras

Step-by-step lessons covering CIE IGCSE Maths Pythagoras for Core and Extended tier. Each lesson works through exam-style questions in Paper 1 and Paper 3 (Core) or Paper 2 and Paper 4 (Extended) format. Start with the Core-tier fundamentals in number and algebra before moving on to the more demanding Extended-only topics like calculus-adjacent algebra and advanced trigonometry.

Lessons