Triangle calculator VC

Please enter the coordinates of the three vertices


Obtuse scalene triangle.

Sides: a = 10.63301458127   b = 4.4722135955   c = 6.40331242374

Area: T = 6
Perimeter: p = 21.50554060052
Semiperimeter: s = 10.75327030026

Angle ∠ A = α = 155.2254859431° = 155°13'29″ = 2.7099184878 rad
Angle ∠ B = β = 10.15442665802° = 10°9'15″ = 0.17772253849 rad
Angle ∠ C = γ = 14.62108739886° = 14°37'15″ = 0.25551823906 rad

Height: ha = 1.12988650421
Height: hb = 2.6833281573
Height: hc = 1.87440851427

Median: ma = 1.5
Median: mb = 8.48552813742
Median: mc = 7.5

Inradius: r = 0.55879992304
Circumradius: R = 12.68333771353

Vertex coordinates: A[0; 0] B[-4; 5] C[4; -2]
Centroid: CG[0; 1]
Coordinates of the circumscribed circle: U[0; 0]
Coordinates of the inscribed circle: I[3.1155495703; 0.55879992304]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 24.77551405688° = 24°46'31″ = 2.7099184878 rad
∠ B' = β' = 169.846573342° = 169°50'45″ = 0.17772253849 rad
∠ C' = γ' = 165.3799126011° = 165°22'45″ = 0.25551823906 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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