# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 1.85   b = 6.2   c = 7.5

Area: T = 4.46768462291
Perimeter: p = 15.55
Semiperimeter: s = 7.775

Angle ∠ A = α = 11.07766720925° = 11°4'36″ = 0.19333243982 rad
Angle ∠ B = β = 40.08109842677° = 40°4'52″ = 0.76995451429 rad
Angle ∠ C = γ = 128.842234364° = 128°50'32″ = 2.24987231125 rad

Height: ha = 4.82990229504
Height: hb = 1.44109181384
Height: hc = 1.19111589944

Median: ma = 6.81883117412
Median: mb = 4.49773603369
Median: mc = 2.62108300212

Inradius: r = 0.57545139844
Circumradius: R = 4.81546385385

Vertex coordinates: A[7.5; 0] B[0; 0] C[1.41655; 1.19111589944]
Centroid: CG[2.97218333333; 0.39770529981]
Coordinates of the circumscribed circle: U[3.75; -3.02196430677]
Coordinates of the inscribed circle: I[1.575; 0.57545139844]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 168.9233327907° = 168°55'24″ = 0.19333243982 rad
∠ B' = β' = 139.9199015732° = 139°55'8″ = 0.76995451429 rad
∠ C' = γ' = 51.15876563602° = 51°9'28″ = 2.24987231125 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    