How to use (3 steps)
- Choose the mode (SSS, SAS, ASA/AAS or SSA) based on which sides and angles you know.
- Enter the known values and, if needed, adjust the angle unit and number of decimals.
- Results update automatically as you type. Use “Copy URL” to share the exact setup or switch between solutions when SSA gives two triangles.
Results
Start with the sample or enter the known values. Results update automatically as you type.
This summary shows all sides, angles, area, radii, heights, medians, and angle bisectors for the triangle defined by your inputs.
Diagram
How it’s calculated
FAQ
Which inputs does this triangle solver support?
The calculator supports SSS, SAS, ASA/AAS, and SSA. SSA automatically checks whether zero, one, or two valid triangles exist and lets you switch between both solutions.
How are the steps calculated?
Angles and missing sides use the law of cosines or the law of sines depending on the mode. Every run shows Heron’s formula, semiperimeter, inradius, circumradius, heights, medians, and angle bisectors alongside an annotated diagram.
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