Triangle Solver
Area, hypotenuse and angles of a right triangle from two sides.
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Step by step
The formula
c = √(a² + b²); area = ½ab
For a right triangle, two sides determine everything else. Pythagoras gives the hypotenuse, half the product of the legs gives the area, and the arctangent of their ratio gives the angles — which is exactly how surveying and navigation turn measurements into positions.
All calculations run locally in your browser and update instantly as you type.
Example calculations
Common questions this calculator answers — select one to load its values.
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Frequently asked questions
Does this assume a right triangle?+
Yes — it treats a and b as the two legs of a right triangle and finds the hypotenuse with the Pythagorean theorem.
All calculations run locally in your browser. Nothing you type is sent to a server.