Triangle calculator VC

Please enter the coordinates of the three vertices


Obtuse scalene triangle.

Sides: a = 6.40331242374   b = 2.23660679775   c = 4.4722135955

Area: T = 3
Perimeter: p = 13.11113281699
Semiperimeter: s = 6.5565664085

Angle ∠ A = α = 143.1330102354° = 143°7'48″ = 2.49880915448 rad
Angle ∠ B = β = 12.0954757077° = 12°5'41″ = 0.21110933332 rad
Angle ∠ C = γ = 24.77551405688° = 24°46'31″ = 0.43224077756 rad

Height: ha = 0.93770425713
Height: hb = 2.6833281573
Height: hc = 1.34216407865

Median: ma = 1.5
Median: mb = 5.40883269132
Median: mc = 4.24326406871

Inradius: r = 0.45876195426
Circumradius: R = 5.33659368645

Vertex coordinates: A[0; 0] B[-2; 4] C[2; -1]
Centroid: CG[0; 1]
Coordinates of the circumscribed circle: U[0; 0]
Coordinates of the inscribed circle: I[2.13655578655; 0.45876195426]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 36.87698976458° = 36°52'12″ = 2.49880915448 rad
∠ B' = β' = 167.9055242923° = 167°54'19″ = 0.21110933332 rad
∠ C' = γ' = 155.2254859431° = 155°13'29″ = 0.43224077756 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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