# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute scalene triangle.

Sides: a = 8.49   b = 16.97   c = 18.97

Area: T = 72.03876326306
Perimeter: p = 44.43
Semiperimeter: s = 22.215

Angle ∠ A = α = 26.58765165307° = 26°35'11″ = 0.46440222501 rad
Angle ∠ B = β = 63.45332712969° = 63°27'12″ = 1.10774685053 rad
Angle ∠ C = γ = 89.96602121724° = 89°57'37″ = 1.57701018982 rad

Height: ha = 16.97699959083
Height: hb = 8.49899979529
Height: hc = 7.59549006463

Median: ma = 17.49900221555
Median: mb = 11.99989697474
Median: mc = 9.49902726515

Inradius: r = 3.24327473613
Circumradius: R = 9.4855002287

Vertex coordinates: A[18.97; 0] B[0; 0] C[3.79444148656; 7.59549006463]
Centroid: CG[7.58881382885; 2.53216335488]
Coordinates of the circumscribed circle: U[9.485; 0.00765866563]
Coordinates of the inscribed circle: I[5.245; 3.24327473613]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 153.4133483469° = 153°24'49″ = 0.46440222501 rad
∠ B' = β' = 116.5476728703° = 116°32'48″ = 1.10774685053 rad
∠ C' = γ' = 90.04397878276° = 90°2'23″ = 1.57701018982 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    