Triangle calculator VC

Please enter the coordinates of the three vertices


Acute isosceles triangle.

Sides: a = 6.32545553203   b = 7.07110678119   c = 7.07110678119

Area: T = 20
Perimeter: p = 20.46766909441
Semiperimeter: s = 10.2333345472

Angle ∠ A = α = 53.13301023542° = 53°7'48″ = 0.9277295218 rad
Angle ∠ B = β = 63.43549488229° = 63°26'6″ = 1.10771487178 rad
Angle ∠ C = γ = 63.43549488229° = 63°26'6″ = 1.10771487178 rad

Height: ha = 6.32545553203
Height: hb = 5.65768542495
Height: hc = 5.65768542495

Median: ma = 6.32545553203
Median: mb = 5.70108771255
Median: mc = 5.70108771255

Inradius: r = 1.95443950758
Circumradius: R = 3.95328470752

Vertex coordinates: A[-6; 1] B[1; 2] C[-1; -4]
Centroid: CG[-2; -0.33333333333]
Coordinates of the circumscribed circle: U[0; 0]
Coordinates of the inscribed circle: I[0.97771975379; 1.95443950758]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 126.8769897646° = 126°52'12″ = 0.9277295218 rad
∠ B' = β' = 116.5655051177° = 116°33'54″ = 1.10771487178 rad
∠ C' = γ' = 116.5655051177° = 116°33'54″ = 1.10771487178 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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