# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute scalene triangle.

Sides: a = 5   b = 11   c = 12

Area: T = 27.49554541697
Perimeter: p = 28
Semiperimeter: s = 14

Angle ∠ A = α = 24.62199773287° = 24°37'12″ = 0.43296996662 rad
Angle ∠ B = β = 66.42218215218° = 66°25'19″ = 1.15992794807 rad
Angle ∠ C = γ = 88.95882011495° = 88°57'30″ = 1.55326135067 rad

Height: ha = 10.99881816679
Height: hb = 4.99991734854
Height: hc = 4.5832575695

Median: ma = 11.23661025271
Median: mb = 7.36554599313
Median: mc = 6.08327625303

Inradius: r = 1.96439610121
Circumradius: R = 6.00109919815

Vertex coordinates: A[12; 0] B[0; 0] C[2; 4.5832575695]
Centroid: CG[4.66766666667; 1.52875252317]
Coordinates of the circumscribed circle: U[6; 0.10991089451]
Coordinates of the inscribed circle: I[3; 1.96439610121]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 155.3880022671° = 155°22'48″ = 0.43296996662 rad
∠ B' = β' = 113.5788178478° = 113°34'41″ = 1.15992794807 rad
∠ C' = γ' = 91.04217988505° = 91°2'30″ = 1.55326135067 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.