# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 115   b = 90   c = 55.5

Area: T = 2444.625544981
Perimeter: p = 260.5
Semiperimeter: s = 130.25

Angle ∠ A = α = 101.8110748449° = 101°48'39″ = 1.77769327744 rad
Angle ∠ B = β = 509.9996123319° = 49°59'59″ = 0.87326578599 rad
Angle ∠ C = γ = 28.19896392189° = 28°11'23″ = 0.49220020193 rad

Height: ha = 42.5155225214
Height: hb = 54.32550099957
Height: hc = 88.09546108039

Median: ma = 47.79899047917
Median: mb = 78.27991479259
Median: mc = 99.4610733458

Inradius: r = 18.76987174649
Circumradius: R = 58.74436615336

Vertex coordinates: A[55.5; 0] B[0; 0] C[73.92111711712; 88.09546108039]
Centroid: CG[43.14403903904; 29.3654870268]
Coordinates of the circumscribed circle: U[27.75; 51.77660105684]
Coordinates of the inscribed circle: I[40.25; 18.76987174649]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 78.18992515509° = 78°11'21″ = 1.77769327744 rad
∠ B' = β' = 1300.000387668° = 130°1″ = 0.87326578599 rad
∠ C' = γ' = 151.8110360781° = 151°48'37″ = 0.49220020193 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    