Triangle geometry solver

  1. Input
  2. Result

Input

Result

Area
6
Perimeter
12
Angles
36.87 / 53.13 / 90
Inradius
1
Circumradius
2.5
Formula
s = (a + b + c) / 2; A = √[s(s − a)(s − b)(s − c)]

Triangle sides calculator

Use the solver for quick geometry homework, layout checks and construction estimates.

The calculator uses Heron formula and the law of cosines.

✓ Use the calculator to turn input values into a clear, repeatable result.
✓ Keep units and assumptions visible so the calculation can be checked later.
✓ Copy the result or key numbers for reports, messages or spreadsheets.
✓ Reset to defaults when you want to compare another scenario from a clean state.
✓ Calculators run in the browser and are useful for quick estimates before formal checks.
✓ For finance, health, engineering or legal decisions, verify important results with a specialist or official source.

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