Triangle Solver Calculator
Solve any triangle using sides and angles with multiple solving methods
About this calculator
The Triangle Solver Calculator is a comprehensive tool that finds all unknown sides and angles of any triangle using various geometric methods. Whether you have two sides and an angle (SAS), two angles and a side (AAS), three sides (SSS), or other combinations, this calculator applies the appropriate solving technique including the Law of Sines, Law of Cosines, and basic trigonometric relationships. Perfect for students, engineers, and professionals who need accurate triangle calculations for geometry, trigonometry, construction, or design projects.
How to use
Enter any combination of known triangle measurements (sides and/or angles) into the input fields. Select your preferred units for angles (degrees or radians) if applicable. Click the calculate button to instantly solve for all unknown triangle properties including remaining sides, angles, area, and perimeter using the most appropriate mathematical method.
Frequently asked questions
What triangle information do I need to solve a triangle?
You need at least three pieces of information, with at least one being a side length. Common combinations include SSS, SAS, ASA, AAS, or SSA.
Can this calculator solve right triangles and obtuse triangles?
Yes, the calculator works for all triangle types including acute, right, and obtuse triangles using appropriate trigonometric methods for each case.
What happens if I enter invalid triangle measurements?
The calculator will detect impossible triangles (like angles totaling over 180°) and display an error message explaining why the triangle cannot exist.