# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 11   b = 17   c = 23

Area: T = 88.64107778621
Perimeter: p = 51
Semiperimeter: s = 25.5

Angle ∠ A = α = 26.96223889975° = 26°57'45″ = 0.47105824622 rad
Angle ∠ B = β = 44.48546064675° = 44°29'5″ = 0.77664028493 rad
Angle ∠ C = γ = 108.5533004535° = 108°33'11″ = 1.89546073421 rad

Height: ha = 16.11765050658
Height: hb = 10.42883268073
Height: hc = 7.70878937271

Median: ma = 19.4621500456
Median: mb = 15.89881130956
Median: mc = 8.52993610546

Inradius: r = 3.47661089358
Circumradius: R = 12.13304215276

Vertex coordinates: A[23; 0] B[0; 0] C[7.8487826087; 7.70878937271]
Centroid: CG[10.28326086957; 2.5699297909]
Coordinates of the circumscribed circle: U[11.5; -3.8659679577]
Coordinates of the inscribed circle: I[8.5; 3.47661089358]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 153.0387611003° = 153°2'15″ = 0.47105824622 rad
∠ B' = β' = 135.5155393533° = 135°30'55″ = 0.77664028493 rad
∠ C' = γ' = 71.4476995465° = 71°26'49″ = 1.89546073421 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    