Triangle calculator VC

Please enter the coordinates of the three vertices


Obtuse scalene triangle.

Sides: a = 10.19880390272   b = 8.24662112512   c = 13.4166407865

Area: T = 42
Perimeter: p = 31.86106581434
Semiperimeter: s = 15.93303290717

Angle ∠ A = α = 49.3998705355° = 49°23'55″ = 0.86221700547 rad
Angle ∠ B = β = 37.87549836511° = 37°52'30″ = 0.66110431689 rad
Angle ∠ C = γ = 92.72663109939° = 92°43'35″ = 1.61883794301 rad

Height: ha = 8.23768776758
Height: hb = 10.18664962515
Height: hc = 6.2610990337

Median: ma = 9.89994949366
Median: mb = 11.18803398875
Median: mc = 6.40331242374

Inradius: r = 2.63664803772
Circumradius: R = 6.71658052992

Vertex coordinates: A[-2; -4] B[4; 8] C[6; -2]
Centroid: CG[2.66766666667; 0.66766666667]
Coordinates of the circumscribed circle: U[0; 0]
Coordinates of the inscribed circle: I[3.3989760485; 2.63664803772]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 130.6011294645° = 130°36'5″ = 0.86221700547 rad
∠ B' = β' = 142.1255016349° = 142°7'30″ = 0.66110431689 rad
∠ C' = γ' = 87.27436890061° = 87°16'25″ = 1.61883794301 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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