Scalene Triangle Calculator

Your details

Choose which three values you know. The calculator solves for the rest using the Law of Cosines, Law of Sines and Heron's formula.
Length of side a (opposite angle A).
cm
Length of side b (opposite angle B).
cm
Length of side c (opposite angle C).
cm
AreaScalene acute triangle
31.4195cm²

Area of the scalene triangle

Perimeter27cm
Side a7cm
Side b9cm
Side c11cm
Angle A39.4006deg
Angle B54.6955deg
Angle C85.904deg
Altitude ha8.977cm
Altitude hb6.9821cm
Altitude hc5.7126cm
Inradius2.3274cm
Circumradius5.5141cm
Median ma9.4207cm
Median mb8.0467cm
Median mc5.8949cm
Semiperimeter13.5cm
StatusValid scalene triangle.

Area = 31.4195 cm2, perimeter = 27.0000 cm.

  • The largest side is 11.0000 cm (opposite the largest angle of 85.90 deg).
  • The smallest side is 7.0000 cm - in a scalene triangle, all sides and all angles are different.
  • Inradius: 2.3274 cm; circumradius: 5.5141 cm - the circumradius is always at least twice the inradius for a scalene triangle.

Next stepThis is a scalene acute triangle: all altitudes fall inside the triangle and all angles are less than 90 degrees.

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