Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Geometry
Hypotenuse Calculator
Solve the hypotenuse of a right triangle from the two legs (a² + b² = c²), or solve a missing leg given the hypotenuse and one leg.
Fill in the required fields to see your result.
Trigonometry
Law of Cosines Calculator
Finds the third side of a triangle when two sides and the included angle are known, using c = √(a² + b² − 2ab·cos(C)). Essential for solving oblique (non-right) triangles in surveying, navigation, structural engineering, and computer graphics.
Fill in the required fields to see your result.
Key differences
| Hypotenuse Calculator | Law of Cosines Calculator | |
|---|---|---|
| Category | Geometry | Trigonometry |
| Inputs required | 4 | 3 |
| Result | Result | Side C (units) |
| What it does | Solve the hypotenuse of a right triangle from the two legs (a² + b² = c²), or solve a missing leg given the hypotenuse and one leg. | Finds the third side of a triangle when two sides and the included angle are known, using c = √(a² + b² − 2ab·cos(C)). Essential for solving oblique (non-right) triangles in surveying, navigation, structural engineering, and computer graphics. |