# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 7.81   b = 6.6   c = 12.79

Area: T = 21.13300373876
Perimeter: p = 27.2
Semiperimeter: s = 13.6

Angle ∠ A = α = 30.04216060772° = 30°2'30″ = 0.52443249386 rad
Angle ∠ B = β = 25.02883431816° = 25°1'42″ = 0.43768269948 rad
Angle ∠ C = γ = 124.9330050741° = 124°55'48″ = 2.18804407201 rad

Height: ha = 5.4111021098
Height: hb = 6.40330416326
Height: hc = 3.30441497088

Median: ma = 9.39880330389
Median: mb = 10.07697616655
Median: mc = 3.37437256854

Inradius: r = 1.55436792197
Circumradius: R = 7.88001913568

Vertex coordinates: A[12.79; 0] B[0; 0] C[7.07766301798; 3.30441497088]
Centroid: CG[6.62222100599; 1.10113832363]
Coordinates of the circumscribed circle: U[6.395; -4.46662019886]
Coordinates of the inscribed circle: I[7; 1.55436792197]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 149.9588393923° = 149°57'30″ = 0.52443249386 rad
∠ B' = β' = 154.9721656818° = 154°58'18″ = 0.43768269948 rad
∠ C' = γ' = 55.07699492588° = 55°4'12″ = 2.18804407201 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.