# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 1.86   b = 2.78   c = 3.71

Area: T = 2.50439019468
Perimeter: p = 8.35
Semiperimeter: s = 4.175

Angle ∠ A = α = 29.0488121141° = 29°2'53″ = 0.50769853554 rad
Angle ∠ B = β = 46.52875750737° = 46°31'39″ = 0.8122059378 rad
Angle ∠ C = γ = 104.4244303785° = 104°25'27″ = 1.82325479202 rad

Height: ha = 2.69223676848
Height: hb = 1.80113683071
Height: hc = 1.35498123703

Median: ma = 3.14334614679
Median: mb = 2.58545212323
Median: mc = 1.46773019457

Inradius: r = 0.65997369933
Circumradius: R = 1.91553773198

Vertex coordinates: A[3.71; 0] B[0; 0] C[1.2879690027; 1.35498123703]
Centroid: CG[1.6633230009; 0.45499374568]
Coordinates of the circumscribed circle: U[1.855; -0.47771218683]
Coordinates of the inscribed circle: I[1.395; 0.65997369933]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 150.9521878859° = 150°57'7″ = 0.50769853554 rad
∠ B' = β' = 133.4722424926° = 133°28'21″ = 0.8122059378 rad
∠ C' = γ' = 75.57656962147° = 75°34'33″ = 1.82325479202 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    