# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute scalene triangle.

Sides: a = 3.5   b = 4.2   c = 4.66

Area: T = 7.06601840656
Perimeter: p = 12.36
Semiperimeter: s = 6.18

Angle ∠ A = α = 46.17549540127° = 46°10'30″ = 0.80659049795 rad
Angle ∠ B = β = 59.96883552323° = 59°58'6″ = 1.04766452458 rad
Angle ∠ C = γ = 73.85766907551° = 73°51'24″ = 1.28990424283 rad

Height: ha = 4.03443908946
Height: hb = 3.36219924122
Height: hc = 3.03301219166

Median: ma = 4.07661869437
Median: mb = 3.54658144339
Median: mc = 3.08548176607

Inradius: r = 1.14224246061
Circumradius: R = 2.42656449748

Vertex coordinates: A[4.66; 0] B[0; 0] C[1.75216738197; 3.03301219166]
Centroid: CG[2.13772246066; 1.01100406389]
Coordinates of the circumscribed circle: U[2.33; 0.67444283089]
Coordinates of the inscribed circle: I[1.98; 1.14224246061]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 133.8255045987° = 133°49'30″ = 0.80659049795 rad
∠ B' = β' = 120.0321644768° = 120°1'54″ = 1.04766452458 rad
∠ C' = γ' = 106.1433309245° = 106°8'36″ = 1.28990424283 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   