Triangle calculator SSS - result

Please enter the triangle sides:

Obtuse scalene triangle.

Sides: a = 200   b = 190   c = 13.31

Area: T = 855.9276914821
Perimeter: p = 403.31
Semiperimeter: s = 201.655

Angle ∠ A = α = 137.3976854607° = 137°23'49″ = 2.39880274948 rad
Angle ∠ B = β = 40.02111663294° = 40°1'16″ = 0.69985011229 rad
Angle ∠ C = γ = 2.58219790632° = 2°34'55″ = 0.04550640359 rad

Height: ha = 8.55992691482
Height: hb = 9.01097569981
Height: hc = 128.6144111919

Median: ma = 90.21440679163
Median: mb = 105.1843544578
Median: mc = 194.9510534688

Inradius: r = 4.24545112436
Circumradius: R = 147.7298734557

Vertex coordinates: A[13.31; 0] B[0; 0] C[153.1611386176; 128.6144111919]
Centroid: CG[55.49904620586; 42.87113706397]
Coordinates of the circumscribed circle: U[6.655; 147.5798758597]
Coordinates of the inscribed circle: I[11.655; 4.24545112436]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 42.60331453926° = 42°36'11″ = 2.39880274948 rad
∠ B' = β' = 139.9798833671° = 139°58'44″ = 0.69985011229 rad
∠ C' = γ' = 177.4188020937° = 177°25'5″ = 0.04550640359 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     