# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 12   b = 19   c = 27

Area: T = 99.29875326985
Perimeter: p = 58
Semiperimeter: s = 29

Angle ∠ A = α = 22.77657191519° = 22°46'33″ = 0.39875112887 rad
Angle ∠ B = β = 37.80329497815° = 37°48'11″ = 0.66597859407 rad
Angle ∠ C = γ = 119.4211331067° = 119°25'17″ = 2.08442954242 rad

Height: ha = 16.55495887831
Height: hb = 10.4522371863
Height: hc = 7.35553727925

Median: ma = 22.56110283454
Median: mb = 18.60877940659
Median: mc = 8.38215273071

Inradius: r = 3.42440528517
Circumradius: R = 15.49988745257

Vertex coordinates: A[27; 0] B[0; 0] C[9.48114814815; 7.35553727925]
Centroid: CG[12.16604938272; 2.45217909308]
Coordinates of the circumscribed circle: U[13.5; -7.61334822231]
Coordinates of the inscribed circle: I[10; 3.42440528517]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 157.2244280848° = 157°13'27″ = 0.39875112887 rad
∠ B' = β' = 142.1977050219° = 142°11'49″ = 0.66597859407 rad
∠ C' = γ' = 60.57986689334° = 60°34'43″ = 2.08442954242 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    