# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 149   b = 176   c = 318.56

Area: T = 5108.615491854
Perimeter: p = 643.56
Semiperimeter: s = 321.78

Angle ∠ A = α = 10.54999073054° = 10°30' = 0.18332579536 rad
Angle ∠ B = β = 12.43105579196° = 12°25'50″ = 0.21769541636 rad
Angle ∠ C = γ = 157.0769534775° = 157°4'10″ = 2.74113805364 rad

Height: ha = 68.57220123293
Height: hb = 58.05224422561
Height: hc = 32.07331725172

Median: ma = 246.3299021433
Median: mb = 232.587705209
Median: mc = 34.90553233762

Inradius: r = 15.87661107544
Circumradius: R = 408.8155186367

Vertex coordinates: A[318.56; 0] B[0; 0] C[145.507708438; 32.07331725172]
Centroid: CG[154.6899028127; 10.69110575057]
Coordinates of the circumscribed circle: U[159.28; -376.5109944363]
Coordinates of the inscribed circle: I[145.78; 15.87661107544]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 169.5500092695° = 169°30' = 0.18332579536 rad
∠ B' = β' = 167.569944208° = 167°34'10″ = 0.21769541636 rad
∠ C' = γ' = 22.9330465225° = 22°55'50″ = 2.74113805364 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    