Triangle calculator VC

Please enter the coordinates of the three vertices


Obtuse scalene triangle.

Sides: a = 6.40331242374   b = 12.04215945788   c = 17.26326765016

Area: T = 26.5
Perimeter: p = 35.70773953179
Semiperimeter: s = 17.85436976589

Angle ∠ A = α = 14.77216214922° = 14°46'18″ = 0.25878134309 rad
Angle ∠ B = β = 28.65218284526° = 28°39'7″ = 0.55000687432 rad
Angle ∠ C = γ = 136.5776550055° = 136°34'36″ = 2.38437104795 rad

Height: ha = 8.27772093801
Height: hb = 4.40114104322
Height: hc = 3.07702075657

Median: ma = 14.53444418537
Median: mb = 11.54333963806
Median: mc = 4.30111626335

Inradius: r = 1.4844286365
Circumradius: R = 12.55767774253

Vertex coordinates: A[2; 7] B[5; -10] C[1; -5]
Centroid: CG[2.66766666667; -2.66766666667]
Coordinates of the circumscribed circle: U[0; 0]
Coordinates of the inscribed circle: I[2.7176524102; 1.4844286365]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 165.2288378508° = 165°13'42″ = 0.25878134309 rad
∠ B' = β' = 151.3488171547° = 151°20'53″ = 0.55000687432 rad
∠ C' = γ' = 43.42334499448° = 43°25'24″ = 2.38437104795 rad

Calculate another triangle




How did we calculate this triangle?

1. We compute side a from coordinates using the Pythagorean theorem


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