Triangle Calculator
Enter any 3 known values (at least one side) to solve the triangle.
Your inputs
Enter three known values, including at least one side.
Your result
Solved sides, angles, and area.
Methods Used
- Law of Cosines: relates sides and included angle
- Law of Sines: relates sides and opposing angles
- Heron's Formula: area from three sides
Tips
- Angles must sum to 180°
- Triangle inequality must hold (sum of any two sides greater than third)