Triangle calculator VC

Please enter the coordinates of the three vertices


Acute scalene triangle.

Sides: a = 15.62204993518   b = 16.12545154966   c = 5.65768542495

Area: T = 44
Perimeter: p = 37.40218690979
Semiperimeter: s = 18.7010934549

Angle ∠ A = α = 74.74548812969° = 74°44'42″ = 1.30545442776 rad
Angle ∠ B = β = 84.80655710923° = 84°48'20″ = 1.48801364396 rad
Angle ∠ C = γ = 20.45495476108° = 20°26'58″ = 0.35769119364 rad

Height: ha = 5.6343622717
Height: hb = 5.45875283219
Height: hc = 15.55663491861

Median: ma = 9.22195444573
Median: mb = 8.54440037453
Median: mc = 15.62204993518

Inradius: r = 2.3532823592
Circumradius: R = 8.09655043131

Vertex coordinates: A[-5; 2] B[-1; 6] C[9; -6]
Centroid: CG[1; 0.66766666667]
Coordinates of the circumscribed circle: U[0; 0]
Coordinates of the inscribed circle: I[0.21438930538; 2.3532823592]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 105.2555118703° = 105°15'18″ = 1.30545442776 rad
∠ B' = β' = 95.19444289077° = 95°11'40″ = 1.48801364396 rad
∠ C' = γ' = 159.5550452389° = 159°33'2″ = 0.35769119364 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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