# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 39.2   b = 28.6   c = 51.18

Area: T = 556.6387516842
Perimeter: p = 118.98
Semiperimeter: s = 59.49

Angle ∠ A = α = 49.51440044174° = 49°30'50″ = 0.86441824029 rad
Angle ∠ B = β = 33.70439501787° = 33°42'14″ = 0.58882449015 rad
Angle ∠ C = γ = 96.78220454039° = 96°46'55″ = 1.68991653491 rad

Height: ha = 28.43998733083
Height: hb = 38.92657004785
Height: hc = 21.75221499352

Median: ma = 36.53110306452
Median: mb = 43.28442488672
Median: mc = 22.8577206741

Inradius: r = 9.35768249595
Circumradius: R = 25.77703262284

Vertex coordinates: A[51.18; 0] B[0; 0] C[32.6111101993; 21.75221499352]
Centroid: CG[27.9330367331; 7.25107166451]
Coordinates of the circumscribed circle: U[25.59; -3.04332899827]
Coordinates of the inscribed circle: I[30.89; 9.35768249595]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 130.4865995583° = 130°29'10″ = 0.86441824029 rad
∠ B' = β' = 146.2966049821° = 146°17'46″ = 0.58882449015 rad
∠ C' = γ' = 83.21879545961° = 83°13'5″ = 1.68991653491 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.