Triangle calculator VC

Please enter the coordinates of the three vertices


Obtuse scalene triangle.

Sides: a = 7.61657731059   b = 12.04215945788   c = 6.40331242374

Area: T = 21.5
Perimeter: p = 26.06604919221
Semiperimeter: s = 13.0330245961

Angle ∠ A = α = 33.89661665634° = 33°53'46″ = 0.59215997103 rad
Angle ∠ B = β = 118.1421601232° = 118°8'30″ = 2.06219599251 rad
Angle ∠ C = γ = 27.96222322044° = 27°57'44″ = 0.48880330182 rad

Height: ha = 5.6466176613
Height: hb = 3.57109556337
Height: hc = 6.71554717612

Median: ma = 8.86600225733
Median: mb = 3.64400549446
Median: mc = 9.55224865873

Inradius: r = 1.65500072266
Circumradius: R = 6.82879679675

Vertex coordinates: A[1; -6] B[5; -1] C[2; 6]
Centroid: CG[2.66766666667; -0.33333333333]
Coordinates of the circumscribed circle: U[0; 0]
Coordinates of the inscribed circle: I[-0.88325620049; 1.65500072266]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 146.1043833437° = 146°6'14″ = 0.59215997103 rad
∠ B' = β' = 61.85883987677° = 61°51'30″ = 2.06219599251 rad
∠ C' = γ' = 152.0387767796° = 152°2'16″ = 0.48880330182 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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