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MathMentor

Learn with Mentor · 7 min

Converse of Pythagoras' Theorem

Use the converse of Pythagoras' theorem to test whether three side lengths form a right-angled triangle.

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What are we learning?

The usual Pythagoras' theorem finds a missing side in a triangle that is already known to be right-angled. The converse goes the other way: it uses three side lengths to test whether the triangle is right-angled.