Triangle calculator VC

Please enter the coordinates of the three vertices


Acute scalene triangle.

Sides: a = 4.69904157598   b = 2.44994897428   c = 4.24326406871

Area: T = 5.17220402164
Perimeter: p = 11.38325461897
Semiperimeter: s = 5.69112730949

Angle ∠ A = α = 84.47881672365° = 84°28'41″ = 1.47444221643 rad
Angle ∠ B = β = 31.31994807061° = 31°19'10″ = 0.54766280583 rad
Angle ∠ C = γ = 64.20223520573° = 64°12'8″ = 1.12105424309 rad

Height: ha = 2.20553653583
Height: hb = 4.22329531531
Height: hc = 2.43881231397

Median: ma = 2.55495097568
Median: mb = 4.30111626335
Median: mc = 3.08222070015

Inradius: r = 0.90987668313
Circumradius: R = 2.35661413093

Vertex coordinates: A[1; 3; 2] B[2; -1; 1] C[-1; 2; 3]
Centroid: CG[0.66766666667; 1.33333333333; 2]
Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 95.52218327635° = 95°31'19″ = 1.47444221643 rad
∠ B' = β' = 148.6810519294° = 148°40'50″ = 0.54766280583 rad
∠ C' = γ' = 115.7987647943° = 115°47'52″ = 1.12105424309 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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