Pythagorean Theorem

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For any right triangle, the area of the square built on the hypotenuse equals the sum of the areas of the squares on the two legs. Set the leg lengths with the sliders and watch the three squares update. The equation shows a² + b² = c² with live values.

a² + b² = c²
= 9 + = 16 = = 25 so c = 5

Find the hypotenuse

Press 'New problem' to start.
Common Pythagorean triples
abc
345
51213
6810
72425
81517
91215
94041