# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 75.73   b = 124   c = 164

Area: T = 4466.973338204
Perimeter: p = 363.73
Semiperimeter: s = 181.865

Angle ∠ A = α = 26.06602994171° = 26°3'37″ = 0.45548380289 rad
Angle ∠ B = β = 465.999653728° = 45°59'59″ = 0.80328454123 rad
Angle ∠ C = γ = 107.9440046855° = 107°56'24″ = 1.88439092124 rad

Height: ha = 117.9711038744
Height: hb = 72.04879577748
Height: hc = 54.47552851468

Median: ma = 140.3654674242
Median: mb = 111.6765943918
Median: mc = 61.89992443411

Inradius: r = 24.56220288788
Circumradius: R = 86.19106456725

Vertex coordinates: A[164; 0] B[0; 0] C[52.6076807622; 54.47552851468]
Centroid: CG[72.20222692073; 18.15884283823]
Coordinates of the circumscribed circle: U[82; -26.5498585677]
Coordinates of the inscribed circle: I[57.865; 24.56220288788]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 153.9439700583° = 153°56'23″ = 0.45548380289 rad
∠ B' = β' = 1344.000346272° = 134°1″ = 0.80328454123 rad
∠ C' = γ' = 72.0659953145° = 72°3'36″ = 1.88439092124 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    