# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 6   b = 26   c = 28

Area: T = 75.8954663844
Perimeter: p = 60
Semiperimeter: s = 30

Angle ∠ A = α = 12.03545697281° = 12°2'4″ = 0.21100428658 rad
Angle ∠ B = β = 64.62330664748° = 64°37'23″ = 1.12878852827 rad
Angle ∠ C = γ = 103.3422363797° = 103°20'32″ = 1.80436645051 rad

Height: ha = 25.29882212813
Height: hb = 5.83880510649
Height: hc = 5.42110474174

Median: ma = 26.85114431642
Median: mb = 15.52441746963
Median: mc = 12.64991106407

Inradius: r = 2.53298221281
Circumradius: R = 14.38883633538

Vertex coordinates: A[28; 0] B[0; 0] C[2.57114285714; 5.42110474174]
Centroid: CG[10.19904761905; 1.80770158058]
Coordinates of the circumscribed circle: U[14; -3.32203915432]
Coordinates of the inscribed circle: I[4; 2.53298221281]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 167.9655430272° = 167°57'56″ = 0.21100428658 rad
∠ B' = β' = 115.3776933525° = 115°22'37″ = 1.12878852827 rad
∠ C' = γ' = 76.65876362029° = 76°39'28″ = 1.80436645051 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    