Triangle calculator VC

Please enter the coordinates of the three vertices


Acute scalene triangle.

Sides: a = 9.84988578018   b = 12.16655250606   c = 10.63301458127

Area: T = 50
Perimeter: p = 32.64545286751
Semiperimeter: s = 16.32222643376

Angle ∠ A = α = 50.64882473737° = 50°38'54″ = 0.8843978677 rad
Angle ∠ B = β = 72.77765638089° = 72°46'36″ = 1.27701906568 rad
Angle ∠ C = γ = 56.57551888174° = 56°34'31″ = 0.98774233198 rad

Height: ha = 10.15334616513
Height: hb = 8.22199493653
Height: hc = 9.40772086838

Median: ma = 10.3087764064
Median: mb = 8.24662112512
Median: mc = 9.70882439195

Inradius: r = 3.0633300469
Circumradius: R = 6.36883357324

Vertex coordinates: A[-7; -1] B[1; 6] C[5; -3]
Centroid: CG[-0.33333333333; 0.66766666667]
Coordinates of the circumscribed circle: U[0; 0]
Coordinates of the inscribed circle: I[0.95496231454; 3.0633300469]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 129.3521752626° = 129°21'6″ = 0.8843978677 rad
∠ B' = β' = 107.2233436191° = 107°13'24″ = 1.27701906568 rad
∠ C' = γ' = 123.4254811183° = 123°25'29″ = 0.98774233198 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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