Triangle Sides and Angles Calculator

Solve Your Triangle

Unlock the mysteries of any triangle with our free Triangle Sides and Angles Calculator. Whether you have sides (SSS), side-angle-side (SAS), angle-side-angle (ASA), angle-angle-side (AAS), or even the ambiguous side-side-angle (SSA) scenario, this tool quickly finds all unknown measurements. Simply input your known values and get instant results for sides and angles.

Formula:

Our Triangle Sides and Angles Calculator utilizes fundamental trigonometric principles:

  • Sum of Angles: A + B + C = 180° (or π radians)
  • Law of Sines: a / sin(A) = b / sin(B) = c / sin(C)
  • Law of Cosines:
    • c² = a² + b² - 2ab cos(C)
    • a² = b² + c² - 2bc cos(A)
    • b² = a² + c² - 2ac cos(B)
Where:
  • a, b, c are the lengths of the triangle's sides.
  • A, B, C are the angles opposite to sides a, b, c respectively.

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