155 175 260 triangle

Obtuse scalene triangle.

Sides: a = 155   b = 175   c = 260

Area: T = 13170.42114056
Perimeter: p = 590
Semiperimeter: s = 295

Angle ∠ A = α = 35.37545904472° = 35°22'29″ = 0.61774030748 rad
Angle ∠ B = β = 40.81550125579° = 40°48'54″ = 0.71223563534 rad
Angle ∠ C = γ = 103.8110396995° = 103°48'37″ = 1.81218332254 rad

Height: ha = 169.9410921362
Height: hb = 150.5199101778
Height: hc = 101.3110933889

Median: ma = 207.622044697
Median: mb = 195.3366248556
Median: mc = 102.1032889283

Inradius: r = 44.645549629
Circumradius: R = 133.877005212

Vertex coordinates: A[260; 0] B[0; 0] C[117.3087692308; 101.3110933889]
Centroid: CG[125.7699230769; 33.77703112963]
Coordinates of the circumscribed circle: U[130; -31.95660769576]
Coordinates of the inscribed circle: I[120; 44.645549629]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 144.6255409553° = 144°37'31″ = 0.61774030748 rad
∠ B' = β' = 139.1854987442° = 139°11'6″ = 0.71223563534 rad
∠ C' = γ' = 76.1989603005° = 76°11'23″ = 1.81218332254 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     