# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute scalene triangle.

Sides: a = 13   b = 20   c = 23

Area: T = 129.6154813968
Perimeter: p = 56
Semiperimeter: s = 28

Angle ∠ A = α = 34.30111527568° = 34°18'4″ = 0.59986680528 rad
Angle ∠ B = β = 60.1110573029° = 60°6'38″ = 1.04991274146 rad
Angle ∠ C = γ = 85.58882742142° = 85°35'18″ = 1.49437971861 rad

Height: ha = 19.94107406105
Height: hb = 12.96114813968
Height: hc = 11.27108533885

Median: ma = 20.5498722588
Median: mb = 15.78797338381
Median: mc = 12.33989626793

Inradius: r = 4.62991004989
Circumradius: R = 11.53441754097

Vertex coordinates: A[23; 0] B[0; 0] C[6.47882608696; 11.27108533885]
Centroid: CG[9.82660869565; 3.75769511295]
Coordinates of the circumscribed circle: U[11.5; 0.88772442623]
Coordinates of the inscribed circle: I[8; 4.62991004989]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 145.6998847243° = 145°41'56″ = 0.59986680528 rad
∠ B' = β' = 119.8899426971° = 119°53'22″ = 1.04991274146 rad
∠ C' = γ' = 94.41217257858° = 94°24'42″ = 1.49437971861 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.