ADVERT
Triangle Calculator
Solve any triangle from common combinations like SSS, SAS, ASA, SSA, or right triangles. Find missing sides, angles, area, and perimeter.
How to use this tool
- Select the triangle mode (SSS, SAS, ASA/AAS, SSA, or right triangle).
- Enter the known sides and angles as positive values, with angles in degrees.
- Review the solved sides, angles, area, perimeter, and derived measures. Export if needed.
What this solver computes
- Missing sides and angles for common triangle input patterns.
- Perimeter, semiperimeter, area, inradius, circumradius, and altitudes.
- Two-solution handling for ambiguous SSA cases.
When SSA gives two triangles
- SSA uses a side-angle-side pattern where the known angle is not included between the known sides.
- Depending on proportions, this can create two valid placements for one vertex.
- The solver shows both valid outcomes so you can compare them directly.
FAQ
- Do I need specific units?
- Any consistent length unit works. If you enter sides in centimeters, perimeter is in centimeters and area is in square centimeters.
- Can this solve right triangles too?
- Yes. In right-triangle mode, enter both legs and the solver computes the hypotenuse, acute angles, area, and perimeter.
- Why does my input show no solution?
- The values may violate triangle constraints, such as triangle inequality in SSS or impossible SSA proportions. Adjust lengths or angle and try again.
ADVERT
ADVERT