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Pythagoras
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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 on Edexcel IGCSE Maths Pythagoras. Each one builds up to exam-style questions. Build confidence with the shared Foundation-tier content first, since roughly 40% of Higher-tier marks are targeted at the grades 4–5 boundary that both tiers have in common.

Lessons