Triangle Solver
Solve any triangle given three known values. Enter sides and/or angles and get all missing values, area, and perimeter.
Enter all three sides.
About Triangle Solver
This tool solves any triangle given three known values using the Law of Sines and Law of Cosines. SSS uses the cosine rule to find angles; SAS finds the third side via the cosine rule then uses the sine rule for remaining angles; ASA derives the third angle (C = 180° − A − B) then applies the sine rule. All angles are in degrees.
Private & free — this tool runs entirely in your browser.
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