Triangle calculator VC

Please enter the coordinates of the three vertices


Obtuse scalene triangle.

Sides: a = 18.02877563773   b = 8.6022325267   c = 10.44403065089

Area: T = 27.5
Perimeter: p = 37.07703881533
Semiperimeter: s = 18.53551940766

Angle ∠ A = α = 142.2376922026° = 142°14'13″ = 2.48325026073 rad
Angle ∠ B = β = 16.9910823292° = 16°59'27″ = 0.29765458091 rad
Angle ∠ C = γ = 20.7722254682° = 20°46'20″ = 0.36325442373 rad

Height: ha = 3.05108510792
Height: hb = 6.39436201309
Height: hc = 5.26880445687

Median: ma = 3.20215621187
Median: mb = 14.08990028036
Median: mc = 13.12444047484

Inradius: r = 1.484366399
Circumradius: R = 14.71989931833

Vertex coordinates: A[3; 5] B[6; -5] C[-4; 10]
Centroid: CG[1.66766666667; 3.33333333333]
Coordinates of the circumscribed circle: U[0; 0]
Coordinates of the inscribed circle: I[4.85656276038; 1.484366399]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 37.7633077974° = 37°45'47″ = 2.48325026073 rad
∠ B' = β' = 163.0099176708° = 163°33″ = 0.29765458091 rad
∠ C' = γ' = 159.2287745318° = 159°13'40″ = 0.36325442373 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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