# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 13   b = 17   c = 25

Area: T = 102.3099273773
Perimeter: p = 55
Semiperimeter: s = 27.5

Angle ∠ A = α = 28.78105000852° = 28°46'50″ = 0.50223144869 rad
Angle ∠ B = β = 39.02202878409° = 39°1'13″ = 0.68110324979 rad
Angle ∠ C = γ = 112.1999212074° = 112°11'57″ = 1.95882456688 rad

Height: ha = 15.74398882728
Height: hb = 12.03663851498
Height: hc = 8.18547419019

Median: ma = 20.36554118544
Median: mb = 18.02108212909
Median: mc = 8.52993610546

Inradius: r = 3.72203372281
Circumradius: R = 13.50107311562

Vertex coordinates: A[25; 0] B[0; 0] C[10.1; 8.18547419019]
Centroid: CG[11.7; 2.72882473006]
Coordinates of the circumscribed circle: U[12.5; -5.10109549844]
Coordinates of the inscribed circle: I[10.5; 3.72203372281]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 151.2199499915° = 151°13'10″ = 0.50223144869 rad
∠ B' = β' = 140.9879712159° = 140°58'47″ = 0.68110324979 rad
∠ C' = γ' = 67.80107879261° = 67°48'3″ = 1.95882456688 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.