# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 13.2   b = 5.3   c = 9.33

Area: T = 19.82440295834
Perimeter: p = 27.83
Semiperimeter: s = 13.915

Angle ∠ A = α = 126.6987953853° = 126°41'53″ = 2.21112964503 rad
Angle ∠ B = β = 18.78799035164° = 18°46'48″ = 0.32877711496 rad
Angle ∠ C = γ = 34.52221426307° = 34°31'20″ = 0.60325250537 rad

Height: ha = 3.0043640846
Height: hb = 7.48107658805
Height: hc = 4.25495240265

Median: ma = 3.74329199831
Median: mb = 11.11985408215
Median: mc = 8.91108234749

Inradius: r = 1.42546517847
Circumradius: R = 8.23215101132

Vertex coordinates: A[9.33; 0] B[0; 0] C[12.4977261522; 4.25495240265]
Centroid: CG[7.27657538407; 1.41765080088]
Coordinates of the circumscribed circle: U[4.665; 6.78220007183]
Coordinates of the inscribed circle: I[8.615; 1.42546517847]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 53.30220461471° = 53°18'7″ = 2.21112964503 rad
∠ B' = β' = 161.2220096484° = 161°13'12″ = 0.32877711496 rad
∠ C' = γ' = 145.4787857369° = 145°28'40″ = 0.60325250537 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 ### 6. Inradius ### 7. Circumradius ### 8. Calculation of medians #### Look also our friend's collection of math examples and problems:

See more informations about triangles or more information about solving triangles.