Triangle calculator

Please enter what you know about the triangle:
Symbols definition of ABC triangle

You have entered side a, c and angle γ.

Triangle has two solutions: a=18.7; b=3.31112488771; c=16.1 and a=18.7; b=27.32550375794; c=16.1.

#1 Obtuse scalene triangle.

Sides: a = 18.7   b = 3.31112488771   c = 16.1

Area: T = 17.75880279927
Perimeter: p = 38.11112488771
Semiperimeter: s = 19.05656244385

Angle ∠ A = α = 138.2255264641° = 138°13'31″ = 2.41224859774 rad
Angle ∠ B = β = 6.77547353587° = 6°46'29″ = 0.1188241438 rad
Angle ∠ C = γ = 35° = 0.61108652382 rad

Height: ha = 1.89992543308
Height: hb = 10.72658793598
Height: hc = 2.20659662103

Median: ma = 6.90439615123
Median: mb = 17.37697699386
Median: mc = 10.74882409985

Inradius: r = 0.93219048058
Circumradius: R = 14.03547467047

Vertex coordinates: A[16.1; 0] B[0; 0] C[18.56994295303; 2.20659662103]
Centroid: CG[11.55664765101; 0.73553220701]
Coordinates of the circumscribed circle: U[8.05; 11.49765914543]
Coordinates of the inscribed circle: I[15.74443755615; 0.93219048058]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 41.77547353587° = 41°46'29″ = 2.41224859774 rad
∠ B' = β' = 173.2255264641° = 173°13'31″ = 0.1188241438 rad
∠ C' = γ' = 145° = 0.61108652382 rad




How did we calculate this triangle?

1. Input data entered: side a, c and angle γ.


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