# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 200   b = 180   c = 23.54

Area: T = 1177.157743026
Perimeter: p = 403.54
Semiperimeter: s = 201.77

Angle ∠ A = α = 146.2465890775° = 146°14'45″ = 2.55224723115 rad
Angle ∠ B = β = 30.0044424696° = 30°16″ = 0.52436760011 rad
Angle ∠ C = γ = 3.75496845292° = 3°44'59″ = 0.06554443409 rad

Height: ha = 11.77215743026
Height: hb = 13.08795270029
Height: hc = 100.0133375553

Median: ma = 80.48802199301
Median: mb = 110.354974309
Median: mc = 189.8998570558

Inradius: r = 5.83441548806
Circumradius: R = 179.9765927224

Vertex coordinates: A[23.54; 0] B[0; 0] C[173.1977357689; 100.0133375553]
Centroid: CG[65.57991192297; 33.3387791851]
Coordinates of the circumscribed circle: U[11.77; 179.5910649757]
Coordinates of the inscribed circle: I[21.77; 5.83441548806]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 33.75441092252° = 33°45'15″ = 2.55224723115 rad
∠ B' = β' = 149.9965575304° = 149°59'44″ = 0.52436760011 rad
∠ C' = γ' = 176.2550315471° = 176°15'1″ = 0.06554443409 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    