Right Triangle Solver
Enter any two values — two sides, or one side and one angle — and the rest of the sides and angles are found. Diagram: c is the hypotenuse, angle A is opposite side a, angle B is opposite side b, and the third angle is always 90 degrees.
How to use
- Enter two sides (leave the third empty), or one side together with one angle.
- The result shows all sides, both acute angles, the area and the perimeter.
- Angles are in degrees; A + B is always 90 degrees.
Note: Pythagoras (a² + b² = c²) and the basic trig ratios (sin, cos, tan) are used. Angles must be between 0 and 90.
Frequently Asked Questions (FAQ)
What does the right triangle solver do?
You enter any two values — two sides, or one side and one angle — and it finds the rest of the sides and angles, plus the area and perimeter. Results update live.
What can I enter?
Any two of side a, side b, hypotenuse c, angle A, or angle B. The third angle is always 90 degrees.
How is the triangle labelled?
c is the hypotenuse, angle A is opposite side a, and angle B is opposite side b — so A plus B always equals 90 degrees.
What math does it use?
The Pythagoras theorem (a squared plus b squared equals c squared) and the basic trig ratios (sin, cos, tan). Angles must be between 0 and 90 degrees.