Triangle calculator SSS - result

Please enter the triangle sides:

Obtuse scalene triangle.

Sides: a = 56.49   b = 25.3   c = 31.2

Area: T = 14.9329657527
Perimeter: p = 112.99
Semiperimeter: s = 56.495

Angle ∠ A = α = 177.8322141234° = 177°49'56″ = 3.10437563804 rad
Angle ∠ B = β = 0.97107269388° = 0°58'15″ = 0.01769423812 rad
Angle ∠ C = γ = 1.19771318267° = 1°11'50″ = 0.0210893892 rad

Height: ha = 0.52985770057
Height: hb = 1.18802100812
Height: hc = 0.95770293287

Median: ma = 2.99774947873
Median: mb = 43.84435576795
Median: mc = 40.89330929376

Inradius: r = 0.26442651124
Circumradius: R = 746.6844013335

Vertex coordinates: A[31.2; 0] B[0; 0] C[56.48218926282; 0.95770293287]
Centroid: CG[29.22772975427; 0.31990097762]
Coordinates of the circumscribed circle: U[15.6; 746.5211035048]
Coordinates of the inscribed circle: I[31.195; 0.26442651124]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 2.16878587655° = 2°10'4″ = 3.10437563804 rad
∠ B' = β' = 179.0299273061° = 179°1'45″ = 0.01769423812 rad
∠ C' = γ' = 178.8032868173° = 178°48'10″ = 0.0210893892 rad

How did we calculate this triangle?

1. The triangle circumference is the sum of the lengths of its three sides 2. Semiperimeter of the triangle 3. The triangle area using Heron's formula 4. Calculate the heights of the triangle from its area. 5. Calculation of the inner angles of the triangle using a Law of Cosines     