Triangle calculator VC

Please enter the coordinates of the three vertices


Obtuse scalene triangle.

Sides: a = 16.49224225025   b = 24.16660919472   c = 15.23215462117

Area: T = 124
Perimeter: p = 55.89900606614
Semiperimeter: s = 27.94550303307

Angle ∠ A = α = 42.35774547059° = 42°21'27″ = 0.73992770474 rad
Angle ∠ B = β = 99.16223470457° = 99°9'44″ = 1.731070945 rad
Angle ∠ C = γ = 38.48801982483° = 38°28'49″ = 0.67216061563 rad

Height: ha = 15.03772087523
Height: hb = 10.26223130187
Height: hc = 16.28219976746

Median: ma = 18.43990889146
Median: mb = 10.2965630141
Median: mc = 19.23553840617

Inradius: r = 4.4377282713
Circumradius: R = 12.23992045065

Vertex coordinates: A[-11; -2; 0] B[-5; 12; 0] C[11; 8; 0]
Centroid: CG[-1.66766666667; 6; 0]
Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 137.6432545294° = 137°38'33″ = 0.73992770474 rad
∠ B' = β' = 80.83876529543° = 80°50'16″ = 1.731070945 rad
∠ C' = γ' = 141.5219801752° = 141°31'11″ = 0.67216061563 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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