# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 10   b = 15.25   c = 7.64

Area: T = 33.39546604916
Perimeter: p = 32.89
Semiperimeter: s = 16.445

Angle ∠ A = α = 34.97771486016° = 34°58'38″ = 0.61104664061 rad
Angle ∠ B = β = 119.0498882075° = 119°2'56″ = 2.0787794963 rad
Angle ∠ C = γ = 25.97439693238° = 25°58'26″ = 0.45333312845 rad

Height: ha = 6.67989320983
Height: hb = 4.38796276055
Height: hc = 8.74220577203

Median: ma = 10.9765702711
Median: mb = 4.58773930505
Median: mc = 12.31662027427

Inradius: r = 2.03106877769
Circumradius: R = 8.72222027627

Vertex coordinates: A[7.64; 0] B[0; 0] C[-4.85655562827; 8.74220577203]
Centroid: CG[0.92881479058; 2.91440192401]
Coordinates of the circumscribed circle: U[3.82; 7.84112002292]
Coordinates of the inscribed circle: I[1.195; 2.03106877769]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 145.0232851398° = 145°1'22″ = 0.61104664061 rad
∠ B' = β' = 60.95111179254° = 60°57'4″ = 2.0787794963 rad
∠ C' = γ' = 154.0266030676° = 154°1'34″ = 0.45333312845 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    