# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 76.79   b = 133   c = 153.58

Area: T = 5106.535499243
Perimeter: p = 363.37
Semiperimeter: s = 181.685

Angle ∠ A = α = 309.999999951° = 30° = 0.52435987747 rad
Angle ∠ B = β = 59.99768800227° = 59°59'49″ = 1.04771430973 rad
Angle ∠ C = γ = 90.00331200264° = 90°11″ = 1.57108507815 rad

Height: ha = 1332.999999803
Height: hb = 76.79899998861
Height: hc = 66.54999999014

Median: ma = 138.4333132505
Median: mb = 101.5854990279
Median: mc = 76.78663786749

Inradius: r = 28.10765304919
Circumradius: R = 76.79900001139

Vertex coordinates: A[153.58; 0] B[0; 0] C[38.39986212397; 66.54999999014]
Centroid: CG[63.99328737466; 22.16766666338]
Coordinates of the circumscribed circle: U[76.79; -0.0044181579]
Coordinates of the inscribed circle: I[48.685; 28.10765304919]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 1500.000000049° = 150° = 0.52435987747 rad
∠ B' = β' = 120.0033119977° = 120°11″ = 1.04771430973 rad
∠ C' = γ' = 89.99768799736° = 89°59'49″ = 1.57108507815 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    