Solve any triangle — find unknown sides, angles, area, perimeter, height, and median. Supports SSS, SAS, AAS, ASA, and SSA inputs using the Law of Sines and Law of Cosines.
Triangle Type
Enter 3 values (at least one side)
Label: sides a, b, c — opposite to angles A, B, C respectively.
Triangle Area
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Area
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Perimeter
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Type
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Circumradius
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Enter at least 3 values (one must be a side)
Supports SSS, SAS, AAS, ASA configurations.
Frequently Asked Questions
What is the Law of Sines?
Law of Sines: a/sin(A) = b/sin(B) = c/sin(C). Used when you know two angles and a side (AAS or ASA), giving all remaining sides.
What is the Law of Cosines?
Law of Cosines: c² = a² + b² − 2ab·cos(C). Used when you know three sides (SSS) or two sides and the included angle (SAS), giving the remaining angle.