Triangle Calculator
Calculate all triangle properties: sides, angles, area, perimeter, heights. Solve using SSS, SAS, ASA, or AAS. Free online triangle calculator.
Triangle Formulas
Area (Heron's): √(s(s-a)(s-b)(s-c)) where s = (a+b+c)/2
Area: ½ × base × height
Perimeter: a + b + c
Law of Sines: a/sin(A) = b/sin(B) = c/sin(C)
Law of Cosines: c² = a² + b² - 2ab·cos(C)
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