Triangle calculator VC

Please enter the coordinates of the three vertices


Obtuse scalene triangle.

Sides: a = 31.95330906173   b = 35.60989876295   c = 11.18803398875

Area: T = 176
Perimeter: p = 78.74224181344
Semiperimeter: s = 39.37112090672

Angle ∠ A = α = 62.14876198814° = 62°8'51″ = 1.08546805892 rad
Angle ∠ B = β = 99.83114569595° = 99°49'53″ = 1.7422387621 rad
Angle ∠ C = γ = 18.02109231591° = 18°1'15″ = 0.31545244434 rad

Height: ha = 11.01661487731
Height: hb = 9.88551448309
Height: hc = 31.48438371232

Median: ma = 21.00659515376
Median: mb = 16
Median: mc = 33.36554012414

Inradius: r = 4.47702716571
Circumradius: R = 18.07698623879

Vertex coordinates: A[11; 4] B[13; -7] C[-17; -18]
Centroid: CG[2.33333333333; -7]
Coordinates of the circumscribed circle: U[0; 0]
Coordinates of the inscribed circle: I[-0.77546777588; 4.47702716571]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 117.8522380119° = 117°51'9″ = 1.08546805892 rad
∠ B' = β' = 80.16985430405° = 80°10'7″ = 1.7422387621 rad
∠ C' = γ' = 161.9799076841° = 161°58'45″ = 0.31545244434 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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