# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 6   b = 27   c = 28

Area: T = 80.8610605365
Perimeter: p = 61
Semiperimeter: s = 30.5

Angle ∠ A = α = 12.35219946365° = 12°21'7″ = 0.21655829756 rad
Angle ∠ B = β = 74.2866138952° = 74°17'10″ = 1.29765377133 rad
Angle ∠ C = γ = 93.36218664115° = 93°21'43″ = 1.62994719647 rad

Height: ha = 26.95435351217
Height: hb = 5.99896744715
Height: hc = 5.77657575261

Median: ma = 27.3440446229
Median: mb = 15.09113882728
Median: mc = 13.65765002837

Inradius: r = 2.6511167389
Circumradius: R = 14.02441344333

Vertex coordinates: A[28; 0] B[0; 0] C[1.625; 5.77657575261]
Centroid: CG[9.875; 1.92552525087]
Coordinates of the circumscribed circle: U[14; -0.82224029452]
Coordinates of the inscribed circle: I[3.5; 2.6511167389]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 167.6488005363° = 167°38'53″ = 0.21655829756 rad
∠ B' = β' = 105.7143861048° = 105°42'50″ = 1.29765377133 rad
∠ C' = γ' = 86.63881335885° = 86°38'17″ = 1.62994719647 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    