# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 11.59   b = 6.3   c = 5.3

Area: T = 1.39901165956
Perimeter: p = 23.19
Semiperimeter: s = 11.595

Angle ∠ A = α = 175.2243711463° = 175°13'25″ = 3.05882306926 rad
Angle ∠ B = β = 2.59441371919° = 2°35'39″ = 0.04552762352 rad
Angle ∠ C = γ = 2.18221513449° = 2°10'56″ = 0.03880857257 rad

Height: ha = 0.243988207
Height: hb = 0.44113068557
Height: hc = 0.52545723002

Median: ma = 0.55549549531
Median: mb = 8.44331362656
Median: mc = 8.94435200005

Inradius: r = 0.1219889314
Circumradius: R = 69.59766980798

Vertex coordinates: A[5.3; 0] B[0; 0] C[11.57881226415; 0.52545723002]
Centroid: CG[5.62660408805; 0.17548574334]
Coordinates of the circumscribed circle: U[2.65; 69.54662283924]
Coordinates of the inscribed circle: I[5.295; 0.1219889314]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 4.77662885368° = 4°46'35″ = 3.05882306926 rad
∠ B' = β' = 177.4065862808° = 177°24'21″ = 0.04552762352 rad
∠ C' = γ' = 177.8187848655° = 177°49'4″ = 0.03880857257 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    