# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute scalene triangle.

Sides: a = 8.3   b = 7.6   c = 7.78

Area: T = 26.86110773395
Perimeter: p = 23.68
Semiperimeter: s = 11.84

Angle ∠ A = α = 65.30990063869° = 65°18'32″ = 1.14398571927 rad
Angle ∠ B = β = 56.29992790971° = 56°17'57″ = 0.98326077867 rad
Angle ∠ C = γ = 58.3921714516° = 58°23'30″ = 1.01991276742 rad

Height: ha = 6.47325487565
Height: hb = 7.0698704563
Height: hc = 6.90551612698

Median: ma = 6.47546969041
Median: mb = 7.09900775736
Median: mc = 6.94221106301

Inradius: r = 2.26986720726
Circumradius: R = 4.56875978833

Vertex coordinates: A[7.78; 0] B[0; 0] C[4.60552956298; 6.90551612698]
Centroid: CG[4.12884318766; 2.30217204233]
Coordinates of the circumscribed circle: U[3.89; 2.39439194689]
Coordinates of the inscribed circle: I[4.24; 2.26986720726]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 114.6910993613° = 114°41'28″ = 1.14398571927 rad
∠ B' = β' = 123.7010720903° = 123°42'3″ = 0.98326077867 rad
∠ C' = γ' = 121.6088285484° = 121°36'30″ = 1.01991276742 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   