Law of Cosines Calculator
Solve SAS & SSS Triangles
Triangle Values
Use Cases
- • SSS: All three sides known
- • SAS: Two sides and included angle
Law of Cosines Formulas
c² = a² + b² - 2ab×cos(C)
b² = a² + c² - 2ac×cos(B)
a² = b² + c² - 2bc×cos(A)
Note
Law of Cosines works best for SSS and SAS cases. For other cases, use Law of Sines.
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