# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 5   b = 7   c = 11

Area: T = 12.96987123493
Perimeter: p = 23
Semiperimeter: s = 11.5

Angle ∠ A = α = 19.68550548247° = 19°41'6″ = 0.34435690201 rad
Angle ∠ B = β = 28.13875265744° = 28°8'15″ = 0.49110924821 rad
Angle ∠ C = γ = 132.1777418601° = 132°10'39″ = 2.30769311514 rad

Height: ha = 5.18774849397
Height: hb = 3.70553463855
Height: hc = 2.35879476999

Median: ma = 8.87441196746
Median: mb = 7.79442286341
Median: mc = 2.59880762114

Inradius: r = 1.12877141173
Circumradius: R = 7.42217082936

Vertex coordinates: A[11; 0] B[0; 0] C[4.40990909091; 2.35879476999]
Centroid: CG[5.13663636364; 0.78659825666]
Coordinates of the circumscribed circle: U[5.5; -4.98331469971]
Coordinates of the inscribed circle: I[4.5; 1.12877141173]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 160.3154945175° = 160°18'54″ = 0.34435690201 rad
∠ B' = β' = 151.8622473426° = 151°51'45″ = 0.49110924821 rad
∠ C' = γ' = 47.82325813991° = 47°49'21″ = 2.30769311514 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.