# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 7.91   b = 5.27   c = 4.7

Area: T = 11.977025307
Perimeter: p = 17.88
Semiperimeter: s = 8.94

Angle ∠ A = α = 104.8610933357° = 104°51'39″ = 1.83301685438 rad
Angle ∠ B = β = 40.08877550725° = 40°5'16″ = 0.76996633157 rad
Angle ∠ C = γ = 35.05113115701° = 35°3'5″ = 0.6121760794 rad

Height: ha = 3.02766126599
Height: hb = 4.54327905389
Height: hc = 5.09437247106

Median: ma = 3.04878558037
Median: mb = 5.94985985745
Median: mc = 6.29766657844

Inradius: r = 1.33989544821
Circumradius: R = 4.0921868168

Vertex coordinates: A[4.7; 0] B[0; 0] C[6.05216170213; 5.09437247106]
Centroid: CG[3.58438723404; 1.69879082369]
Coordinates of the circumscribed circle: U[2.35; 3.35497589621]
Coordinates of the inscribed circle: I[3.67; 1.33989544821]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 75.13990666426° = 75°8'21″ = 1.83301685438 rad
∠ B' = β' = 139.9122244928° = 139°54'44″ = 0.76996633157 rad
∠ C' = γ' = 144.949868843° = 144°56'55″ = 0.6121760794 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    